I'm noticing strange WiFi issues, in that my data speeds keep slowing down to a standstill for no reason.
In fact, when I first booted the device, and started to install my apps, I wondered why there were downloading so slowly, so I installed "SpeedTest" and sure enough my data speeds were like 1.5mbps. To test that my network hadn't just suddenly gone crazy, I ran the test from my laptop and that confirmed normal speeds.
To remedy this, I changed my advanced wifi settings to just use the 2.4 ghz signal, then changed my router settings (a BT Home Hub 3) from smart wireless (auto changes channel to the "best" channel to just remain on that already pre determined best channel.
I then immediately saw an improvement, as it was downloading now at about 27mbps... and so I thought I'd cracked it.
Apparently not.... It regularly goes back to downloading really slowly, and sometimes, messing with all those settings again doesn't do anything to improve the speeds.
Anyone else experiencing this, or has any insights as to what is going on? could it be a wifi driver issue, which may be rectified in later updates or baseband versions?
Here are some pics to give you an idea... all from the same network
Back to awesome after changing router security settings... I wonder how long it will last this time?
Sent from my Nexus 5 using Tapatalk
Exactly the same for me:
http://forum.xda-developers.com/showthread.php?t=2514501
I'm being sent a replacement but I can't say I'm convinced that one will be any different.
This issue occurred on my BT home hub, a tp-link access point, and the access points where I work.
I am posting this as it is very hard to wade through information in forums. I'm hoping the following will be useful to those, who like me, experienced battery drain caused by Android Wake Locks after upgrading to MJ7 / MK2.
I am 100% certain the battery drain in MJ7/MK2 is caused by connecting to WIFI networks in environments that have multiple AP's. i.e. once WIFI roams from one AP to another the battery drain starts. All my testing confirms this - consistently. I have actually tested being connected to one AP in a multiple AP environment for a long period and observed no wake locks on Android OS. Yet as soon I move to another location (i.e when I make it roam) the wake lock and battery drain starts. All this rubbish about clearing cache, factory resetting, nobbling your phone and so on are all stabs in the dark - It's the reboot that temporarily fixes it so people mistakenly put two and two together. So, if you use WIFI in a large building with multiple AP's try forgetting the network and not connecting to WIFI with multiple AP's. If you have already connected to a SSID with multiple AP's reboot your phone because once the battery drain starts it does not seem to stop until you reboot. You don't have to disable WIFI at all as scanning does not cause the wake lock. I have tested this thoroughly and so far I have not had any battery drain since not connecting to SSIDs with multiple APs. I can also back this up as I can create battery drain at will by simply connecting to a WIFI environment with an SSID distributed over multiple AD's.
My battery life is again fantastic and I am happy now that I know the cause.
Pretty poor testing by Samsung/Google as I see in past versions of Android Roaming has been an issue.
mongoose3800 said:
I am posting this as it is very hard to wade through information in forums. I'm hoping the following will be useful to those, who like me, experienced battery drain caused by Android Wake Locks after upgrading to MJ7 / MK2.
I am 100% certain the battery drain in MJ7/MK2 is caused by connecting to WIFI networks in environments that have multiple AP's. i.e. once WIFI roams from one AP to another the battery drain starts. All my testing confirms this - consistently. I have actually tested being connected to one AP in a multiple AP environment for a long period and observed no wake locks on Android OS. Yet as soon I move to another location (i.e when I make it roam) the wake lock and battery drain starts. All this rubbish about clearing cache, factory resetting, nobbling your phone and so on are all stabs in the dark - It's the reboot that temporarily fixes it so people mistakenly put two and two together. So, if you use WIFI in a large building with multiple AP's try forgetting the network and not connecting to WIFI with multiple AP's. If you have already connected to a SSID with multiple AP's reboot your phone because once the battery drain starts it does not seem to stop until you reboot. You don't have to disable WIFI at all as scanning does not cause the wake lock. I have tested this thoroughly and so far I have not had any battery drain since not connecting to SSIDs with multiple APs. I can also back this up as I can create battery drain at will by simply connecting to a WIFI environment with an SSID distributed over multiple AD's.
My battery life is again fantastic and I am happy now that I know the cause.
Pretty poor testing by Samsung/Google as I see in past versions of Android Roaming has been an issue.
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Click to collapse
Funny thing is that when i am using mobile data the drain is worse, So I'm pretty sure this is not the main issue man. Also, I have a Mobile 'WiFi' router. Only me has WiFi connection in my entire hostel. So I don't really think it's the issue. Good finds tho! It will definitely help someone. Cheers!
Agree with stanley, this is not the only cause.
39089665568
vndnguyen said:
Agree with stanley, this is not the only cause.
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Agreed. There are many things that will cause elevated use. But Im talking the rapid drain that occurs when you're not using the phone. Ever since taking the action I describbed my battery life has been excellent. Eg 94% after 14 odd hours with no use. And, I'm still connecting to my home wifi. Beforehand it could be below 60% with no use and this is the real problem people are talking about. Hope that makes sense.
Actually it's the opposite. If you set up your modem to have a separate AP for the phone and isolate it from the rest of the network, you'll have much better battery life on wifi because you'll stop your phone from waking up by broadcast packets.
aydc said:
Actually it's the opposite. If you set up your modem to have a separate AP for the phone and isolate it from the rest of the network, you'll have much better battery life on wifi because you'll stop your phone from waking up by broadcast packets.
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I don't get it. What am I supposed to do exactly?
aydc said:
Actually it's the opposite. If you set up your modem to have a separate AP for the phone and isolate it from the rest of the network, you'll have much better battery life on wifi because you'll stop your phone from waking up by broadcast packets.
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What about unicast traffic? i know the Client Isolation sort of "VLAN"s every client associated, just wondering if that might affect client to client communication?
Good point btw, im also wondering how many services wake the damn thing up, waking up over network is more an enterprise workstation scenario...to me it sounds like HotSpot 2.0 services being active, but i have not enabled it.
HS2.0 can let client and AP sort of talk without associating.
Nazty111 said:
I don't get it. What am I supposed to do exactly?
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Most modems have a sort of 'guest mode' or allow you to open another access point and isolate it from the rest of the network. If you connect your phone to this guest access point or isolated access point, your phone will reach internet without problems, but will not reach the local network through the router. Nor will any other device on the network reach your phone.
Most of the problems with Wifi draining battery, like wifi wakelocks, occurs because devices on the network keep sending packets to the phone waking it up. With the method I describe above, you will isolate your phone and the phone will remain in deep sleep, significantly increasing battery life.
aydc said:
Most modems have a sort of 'guest mode' or allow you to open another access point and isolate it from the rest of the network. If you connect your phone to this guest access point or isolated access point, your phone will reach internet without problems, but will not reach the local network through the router. Nor will any other device on the network reach your phone.
Most of the problems with Wifi draining battery, like wifi wakelocks, occurs because devices on the network keep sending packets to the phone waking it up. With the method I describe above, you will isolate your phone and the phone will remain in deep sleep, significantly increasing battery life.
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This is very true. Back on my old GNex i used to have crazy wifi wakelocks and I couldn't for the life of me figure it out. I never figured it out, actually. But I am positive it is one of the two PC's on my network that are broadcasting packets across the network, waking my phone up. I haven't had time to extensively test the wifi wakelock in the environment i've previously encountered it in to see if it still applies, but since I haven't changed anything regarding any of the two computers involved on that network, I'm positive I will have the same wifi wakelock issue when I get back and test. Is there a way (besides using Shark) to see what programs are broadcasting packets across the network?
But to get back on topic, I am experiencing battery drain connected to ONE router with ONE AP. I am in an apartment building with several other routers nearby, though. Maybe they are broadcasting packets somehow that the kernel is interpreting and keeping the phone awake? However it seems as though the Android OS bug keeps coming back for everyone no matter what, even in airplane mode.
Wifi has evolved a lot the last decade, not just by technology standards but into integration as well. carriers use them as small cells, we'll see them more often in the future (malls, stadiums, etc), and HS2.0 adds to make it a bit more seamless, they call it offload, taking your data needs through small wifi cells rather then the macro cells (3g, 4g), hence offload.
my point is that they would have never invested in that if the wifi chips inside consumer products were not efficient enough, so nearby APs shouldnt be a problem at all. But im still puzzled for what would one need the waking up process through wifi?
If Wifi is the general bugger, then somebody throw an eye on the Passport service, thats the consumer name for HS 2.0 services.
PS, tested AP Isolation on my sh!tty WRT120N, no difference unfortuantely.
Will there be a future update from Sammy or will we get Kitkat directly
Sent from my SM-N900 using Tapatalk
Just a follow up. I have still had no battery drain since avoiding connecting to wifi networks that use multiple APs. Now, i only connect to wifi networks where i know there is only one AP. Before I stumbled across this the drain and Android os wake lock was bad, really bad, after I had connected to large wifi networks - I just hadn't put two and two together. This is more than coincidence - my testing is sound and replicable. And, this week I have been in remote areas with weak to no 3g signal and the battery life has still been fantastic and no wake locks so that sort of rules that out - Sure there is a little increase in battery usage but nothing dramatic, something to be expected and certainly not something to complain about. I have seen many claims to fix battery drain but these are just fine tuning and not addressing the major drain caused by Android OS wake locks. Clearly, there must be an issue with the wifi software driver in MJ7/MK2 and I hope Samsung/Google are aware of it. The annoying thing is getting Samsung to acknowledge the issue and take feedback.
I get wake locks even if I manually turn wifi off and only use data. When I use wifi i am connected to only one AP and I still get wake locks. The wake locks aren't apps, they are "Powermanager.wakelocks" and "Powermanager.Display" and show up as "Android OS" in battery settings.
I am still not convinced avoiding multiple AP wifi networks is the one-for-all solution for everyone.
However, I have put "wifi on during sleep" to "never," yet my phone slept maybe 50% yesterday but wifi was on 100% of the time. Why is this? Shouldn't it have turned off the 50% that the phone was sleeping?
Something is weird with the wifi module..
Sent from my SM-N9005 using xda app-developers app
EddieN said:
I get wake locks even if I manually turn wifi off and only use data. When I use wifi i am connected to only one AP and I still get wake locks. The wake locks aren't apps, they are "Powermanager.wakelocks" and "Powermanager.Display" and show up as "Android OS" in battery settings.
I am still not convinced avoiding multiple AP wifi networks is the one-for-all solution for everyone.
However, I have put "wifi on during sleep" to "never," yet my phone slept maybe 50% yesterday but wifi was on 100% of the time. Why is this? Shouldn't it have turned off the 50% that the phone was sleeping?
Something is weird with the wifi module..
Sent from my SM-N9005 using xda app-developers app
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Have you ruled out any other wifi connections? Have you tried rebooting if you have connected to another wifi network? Have you tried forgetting all wifi networks? Reboot after forgetting all networks. Then give it a couple of days with out connecting to any wifi network - just a test to confirm it is wifi related. I tend to think setting wifi to never on during sleep makes no difference - I had previously tried it too. Once the drain starts the only way to stop it is to reboot.
mongoose3800 said:
Have you ruled out any other wifi connections? Have you tried rebooting if you have connected to another wifi network? Have you tried forgetting all wifi networks? Reboot after forgetting all networks. Then give it a couple of days with out connecting to any wifi network - just a test to confirm it is wifi related. I tend to think setting wifi to never on during sleep makes no difference - I had previously tried it too. Once the drain starts the only way to stop it is to reboot.
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Yes, just last week I was on another Wifi AP about ~300km away (totally different environment) and I still had the same wake locks. I have rebooted when connecting to another wifi network. I have tried forgetting all wifi networks i have connected to, and reconnecting to them. I have also rebooted once forgetting networks. During this time I also took the liberty of doing the normal rounds of disabling location services etc. before rebooting, but nevertheless i did reboot once forgetting the network. All networks I have been connected to have been single-AP wifi networks.
I have not let it sit for a few days without connecting to any wifi networks. That's the only thing I haven't tried. However I have let it go a whole day with wifi turned off (and only data enabled), but the same wakelocks persisted. For me it's always "Powermanage.Display" and "Powermanager.Wakelocks" no matter how long i just let my phone sit around with the screen turned off. I have it right beside me so I always have visual access to the screen in case the phone wakes up on its own, but it never has. I guess I could try turning wifi off for a few days and seeing how it fares, but I doubt I will see any difference (wake lock wise).
I'm thinking something is strange with the wifi module anyway. Surely wifi should turn off by itself once the phone sleeps, right? Like I said in my other post, my phone slept maybe 50-60% of the time on a 14 hour day. That means Wifi should have been on 40-50% of that time, and off 50-60% since the phone technically should have been sleeping. Yet I can see in the battery settings menu that wifi is a solid green bar all across the 14 hours.
EddieN said:
Yes, just last week I was on another Wifi AP about ~300km away (totally different environment) and I still had the same wake locks. I have rebooted when connecting to another wifi network. I have tried forgetting all wifi networks i have connected to, and reconnecting to them. I have also rebooted once forgetting networks. During this time I also took the liberty of doing the normal rounds of disabling location services etc. before rebooting, but nevertheless i did reboot once forgetting the network. All networks I have been connected to have been single-AP wifi networks.
I have not let it sit for a few days without connecting to any wifi networks. That's the only thing I haven't tried. However I have let it go a whole day with wifi turned off (and only data enabled), but the same wakelocks persisted. For me it's always "Powermanage.Display" and "Powermanager.Wakelocks" no matter how long i just let my phone sit around with the screen turned off. I have it right beside me so I always have visual access to the screen in case the phone wakes up on its own, but it never has. I guess I could try turning wifi off for a few days and seeing how it fares, but I doubt I will see any difference (wake lock wise).
I'm thinking something is strange with the wifi module anyway. Surely wifi should turn off by itself once the phone sleeps, right? Like I said in my other post, my phone slept maybe 50-60% of the time on a 14 hour day. That means Wifi should have been on 40-50% of that time, and off 50-60% since the phone technically should have been sleeping. Yet I can see in the battery settings menu that wifi is a solid green bar all across the 14 hours.
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Well that's interesting. At least in both cases we know it's Wi Fi. I wonder if it's something if it comes down to the type of connection. Eg 2.4 vs 5ghz
mongoose3800 said:
Well that's interesting. At least in both cases we know it's Wi Fi. I wonder if it's something if it comes down to the type of connection. Eg 2.4 vs 5ghz
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It could be. Both networks I have been connected to have been 2.4GHz Wireless-N capable routers. I just find it odd that a lot of things don't add up when looking at awake times in Settings -> Battery and comparing it to kernel/partial wakelocks in BBS/WLD/CPU Spy. All of the times seem to be roughly in the same ballpark, but they never add up to correspond to each other. Surely there must be information missing in this regard.
I can confirm the WiFi issue on my N9005 but there's another one.
1. Wifi: I experienced this at my university, where we have good Wifi coverage on the whole campus. They use Radius for logging in. After using Wifi for about 15min, I had these wakelocks, which didn't stop until I rebooted the phone. Since I knew this, I haven't been using Wifi there any more. But: In the meantime, I did a factory reset and got this little stability update. A few days ago, I gave it a try again. Used Wifi at university for ~25min and hat no issues. Maybe it's gone, I will test again some day.
2. I had an app called "gentle alarm". On my GNexus, which I used before my Note 3, I also had wakelocks, but couldn't figure out what it was, since wakelock detector, better battery stats etc. didn't show more than PowermanagerService.Wakelocks/Display. So I got my new Note 3 and still had these Wakelocks - I did much Monitoring and: It was this tiny alarm app. Very funny: After having excluded every other possibility and having the wakelocks active I uninstalled the app on my Note 3 and it instantly rebooted!
Great battery life now.
Hope this helps someone. BTW: The Wifi issue on larger networks seems to be a problem not only on Samsung phones, many people are experiencing this (e.g. found similar reports for Nexus 5...).
duffmannr3 said:
I can confirm the WiFi issue on my N9005 but there's another one.
1. Wifi: I experienced this at my university, where we have good Wifi coverage on the whole campus. They use Radius for logging in. After using Wifi for about 15min, I had these wakelocks, which didn't stop until I rebooted the phone. Since I knew this, I haven't been using Wifi there any more. But: In the meantime, I did a factory reset and got this little stability update. A few days ago, I gave it a try again. Used Wifi at university for ~25min and hat no issues. Maybe it's gone, I will test again some day.
2. I had an app called "gentle alarm". On my GNexus, which I used before my Note 3, I also had wakelocks, but couldn't figure out what it was, since wakelock detector, better battery stats etc. didn't show more than PowermanagerService.Wakelocks/Display. So I got my new Note 3 and still had these Wakelocks - I did much Monitoring and: It was this tiny alarm app. Very funny: After having excluded every other possibility and having the wakelocks active I uninstalled the app on my Note 3 and it instantly rebooted!
Great battery life now.
Hope this helps someone. BTW: The Wifi issue on larger networks seems to be a problem not only on Samsung phones, many people are experiencing this (e.g. found similar reports for Nexus 5...).
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Thanks for your input. Is the wifi issue you are talking about the fact that it doesnt turn off when having "wifi on during sleep -> never" set? Or the multiple-AP issue the thread is talking about?
What stability update is it that you have received? What country are you in and what firmware are you using? Did you get this stability update while on MJ7/MK2 firmware? I haven't received any notification for a stability update OTA...
Thanks for the Powermanager.Display/Wakelock issue. I guess I will have to sift through my apps and uninstall each, one by one, to see if the wakelocks disappear. If not, there is some other issue
EddieN said:
Is the wifi issue you are talking about the fact that it doesnt turn off when having "wifi on during sleep -> never" set? Or the multiple-AP issue the thread is talking about?
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Click to collapse
It's the issue about "multiple" APs, but I don't think that it is about the number of APs. What I have read is that there is so much traffic on those big networks, e.g. broadcasts from other devices. I don't know how it should be with your problem that wifi doesn't turn off - can you see if it's reconnecting after some standby time? If yes, then wifi is turned off during sleep, but is just not shown in statistics.
EddieN said:
What stability update is it that you have received? What country are you in and what firmware are you using? Did you get this stability update while on MJ7/MK2 firmware? I haven't received any notification for a stability update OTA...
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Click to collapse
I'm currently on MJ7/MK2. My device is unbranded and I'm living in Germany. It came on 26th of December and was about 30MB or so.
EddieN said:
Thanks for the Powermanager.Display/Wakelock issue. I guess I will have to sift through my apps and uninstall each, one by one, to see if the wakelocks disappear. If not, there is some other issue
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It's definitely worth a try! There was absolutely no hint that pointed to this one app. I started with having a look at the battery statistics ~every 30min after a fresh reboot. After a few days it was clear that it only could be the alarm app, battery draining started only in the morning.
Anyone else with WiFi issues? 90% of the time I have no problems but 10% of the time it seems the connection hangs. Data transfer will pause and resume 30 secs or a minute later. I have tested this with speed test and was able to reproduce. Happens on both my 2ghz and 5ghz networks. I am rooted but I'm going to do a factory reset to see if issue persists. I do know it's not my WiFi as my other devices have no trouble. But this is quite annoying.
Sent from my HTC6525LVW using Tapatalk
murryrulz said:
Anyone else with WiFi issues? 90% of the time I have no problems but 10% of the time it seems the connection hangs. Data transfer will pause and resume 30 secs or a minute later. I have tested this with speed test and was able to reproduce. Happens on both my 2ghz and 5ghz networks. I am rooted but I'm going to do a factory reset to see if issue persists. I do know it's not my WiFi as my other devices have no trouble. But this is quite annoying.
Sent from my HTC6525LVW using Tapatalk
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Are you by chance using an Apple router or access point? For some reason, they don't seem to play well with Android devices, including my M8. I've had a similar experience with 4 Android devices and 2 different Apple routers. The devices continuously disconnect and reconnect.
No I'm using an Asus ac66. The funny thing is the connection doesn't drop. It always says connected. The data just stops flowing and then starts again. For example I'll run a speed test and the download will pause then start up again. Very odd. Never had a phone do this before
Sent from my Nexus 7 using Tapatalk
I've got an Apple Airport Extreme. I also have several Android devices. Have had many that I no long have or use. I've never had any problem with my wifi on any of them. I have to wonder if your problem isn't related to something else. Or, possibly your router needs to be replaced. Might be a matter of settings too. But, like I said, I've never had any problems with mine.
Within the "Advanced Wi-Fi" settings there is an auto-enabled option called "Wi-Fi Optimization" which minimizes battery usage when Wi-Fi is on. I assume this monitors for extended periods of inactivity (screen off, no active downloads, etc.) and temporarily disables/hibernates Wi-Fi activity.
I've kept this option enabled and haven't had any issues so far, but maybe you could try testing with/without this setting enabled? Another thing to try would be checking highly-used radio channels in your area with an application like InSSIDer and making sure your router is broadcasting on a low-use channel. I see no correlation with the radio channel and your new M8, but it's worth a try
insertnewsn said:
Within the "Advanced Wi-Fi" settings there is an auto-enabled option called "Wi-Fi Optimization" which minimizes battery usage when Wi-Fi is on. I assume this monitors for extended periods of inactivity (screen off, no active downloads, etc.) and temporarily disables/hibernates Wi-Fi activity.
I've kept this option enabled and haven't had any issues so far, but maybe you could try testing with/without this setting enabled? Another thing to try would be checking highly-used radio channels in your area with an application like InSSIDer and making sure your router is broadcasting on a low-use channel. I see no correlation with the radio channel and your new M8, but it's worth a try
Click to expand...
Click to collapse
I have the same issues. and ive turned off wifi optimizaiton, ive set my wifi control frequency to 149, ive tried to switch between 2.4 and 5ghz. i feel like my issue is with the phone not picking up the wifi signals very well... we live in a brick house, and the asus ac68u sits right in the middle of th house, and my room is only right around the corner. everyone elses phone picks up 5ghz or 2.4ghz frequency fine in my room, even my gf's M8 (we bought ours from verizon same time for the deal). i literally get wifi in my rom 10% of the time or its choppy and slow. so everytime im in my room i have to switch to cellular :|
The new update has made WiFi basically useless for me. It will work fine for 5 minutes, then just stop. I will still have full bars of WiFi, but it just does nothing until I turn it of and on again.
Anyone else experiencing this? Have any ideas how to fix it?
Well maybe more then one solution
It can be Various factors for that not just your tablet as I had similar problem with tablet or smartphones or ps4 or pc , what it is everything runs on radio frequencies and if your surrounding by the people who as wifi running on same band channel or radio cordless landline phones those and many who uses radio frequencies will disturb your wifi strength even cause to drops as your having at the moment, for this you can easily check with the "Wifi Analyzer" from play store . Then go to your router settings and take your wifi channell to another usually they are up to 1-14 I use 9 or 8 or 4 usually other numbers used ato by the router settings and they choose rest of the numbers, so this has been cleared.
LEts have a look at the other possibilities of disturbance , did you register another wiriless on your tablet maybe that will try to reconnect another one so go to settings wifi pick the one u dont want to register but you registered another time for testing" forget that network".
Also can be caused by your mobile
Does yourshield has a mobile option on ? try to disable mobile data and use it.
MAybe it is because of your router power adapter thats another problem just swtich off your router my suggestions is always close your router and all electronic equipment when you goto sleep .
Well I hope those tips will help you if not if not probably someone else suggests another solution for you. Fingers Crossed for you matey
As another data point, I'm running the updated too, but have no wifi problems since the update. I just ran a speed test and I'm getting my full expected throughput. The update may have reset something in the tablet that you had customized but in and of itself the update doesn't seem to be a wifi killer. LanthesX has some good suggestions.
Best of luck!
Marc
Is anyone else having an issue with WiFi calling disconnecting itself, especially overnight? I'm using T-Mobile and when the WiFi calling will stay connected, it works as it should. But often it either won't connect to WiFi calling when reconnecting to my home network, or most often, by the time I get up in the morning, it has fallen off WiFi calling and either has "no service" or is trying to use the virtually non existent T-Mobile signal in my home. I see no indication that it's losing the WiFi connection overnight as it's not reconnecting when I wake the phone up in the morning. I've tried prioritizing the device through my Netgear R7000 router, updating the T-Mobile account settings including the e911 address, making sure my WiFi calling settings on the phone are on and set to WiFi preferred, and rebooting into Safe Mode to make sure a third party app wasn't somehow causing the issue. (The same issue occurred in Safe Mode)
Any ideas?
Thank you all for any assistance you can provide.
Wish I had an idea. All I can tell you is I share in your misery as Wi-Fi Calling is inconsistent for me as well. While it works most of the time, sometimes it’ll drop off for no apparent reason. When it does, I can usually force Wi-Fi Calling to reestablish by putting the phone in and out of airplane mode.
FWIW, I use high-end Wi-Fi gear at home and a custom-built firewall.
Not sure if this applies to you but take a look here:
http://www.androidpolice.com/2017/10/24/google-inexplicably-removed-keep-wifi-sleep-toggle-pixel-2/
It's been my experience that Google's implementation is poor at best for WiFi calling. Constant disconnects are common and sometimes reboots are the only thing that will get it working again. It's been this way since it's inception on the Nexus devices back in the day.
On other devices such as Samsung and OnePlus WiFi calling just works. But it's always been hit or miss on Nexus/Pixel deives.
Thank you all for chiming on the matter. It does make it a little less maddening to know it's not unique to my particular device or network setup as Google customer service would imply. Their solution was to have me send in my several week old "defective" device and get a refurbished one from them instead. Besides offering no explanation as to what kind of hardware fault could possibly cause this issue, I think it's ridiculous that someone making a warranty claim on a device less than a month old for a manufacturer defect would be sent a used replacement, particularly a device at this price point.
If it helps anyone, I've found if I switch the phone to airplane mode, and turn on WiFi while leaving airplane mode on, WiFi calling has been a bit more stable so far.