Fingerprint Scanner Gone? - HTC U11 Questions & Answers

Charged phone during long flight, and read a lot. After landing, fingerprint sensor was like 50%. Reboot, no improvement. Menu for fingerprint settings...click and lag, nothing. Reboot. Now fingerprint menu is gone. So is home button!
PITA....got Leedrod tweaks for Navbar! Dirty flash, and no fp sensor. Clean flash, no fp sensor. Restore stock system and wipe data...doesn't even ask for fingerprint on setup. It's like the hardware disappeared. Tried force stop fingerprint software from settings, apps, show system, and clear data. Reboot again...gone.
Wakeup next day, reboot and it works? So flash Leedroid, and restore my Nandroid data...all good now.
So what can cause the loss of the hardware like this? Some kind of security lockout? Or hardware fault? Didn't get wet. Still in 30 day period...should I send it back?

Has there been a software update from htc for the fingerprint sensor?. Things usually go mental when updates occur..
Beamed in by telepathy

shivadow said:
Has there been a software update from htc for the fingerprint sensor?. Things usually go mental when updates occur..
Beamed in by telepathy
Click to expand...
Click to collapse
No changes from my end regarding software. I guess it's possible something got corrupted with flashing and stuff. Seems to be a common problem on other devices:
https://forums.oneplus.net/threads/...vailable-issue-started-out-of-nowhere.450914/
They describe same situation as me. Hardware just disappears, and the related menus.
Thought mine was fixed, but it happened again last night. I let battery fully drain, then fully charged, rebooted, and it's back again? I did walk around in the rain last night...could be related.
Wish I knew if this was software or hardware issue. Guess only way to know would be to RUU.
Another weird thing: I have to enter a pin now when phone boots up. Not on the lock screen, but on a separate system prompt. Same thing when I start TWRP. Could be a security issue? Or a conflict in PIN settings?
Any help appreciated!

There's already a thread about this https://forum.xda-developers.com/u11/help/home-button-fingerprint-sensor-stopped-t3632297 this is no hallucination, I experienced it myself, and also a lot of One Plus 5, LG G5 and G6 owners. Seems to be a hardware implementation issue. Maybe same FP scanner manufacturer ?

Related

Proximity sensor and others not working properly after android 10 update

My Pixel 3's proximity sensor reads 0cm after android 10 update(using Sensors Multitool), and double tap to wake and lift to wake not working.
I've search on the internet and I read the post of "FIXED - Android 10 - Sensors Bug". and also tried using proximity sensor reset or calibrate app, but all seem not working.
In my case, all other sensors works perfectly(Active Edge,Ambient Light Sensor, Auto-brightness, Accelerometer, Auto-rotation), but proximity sensor have reading of 0cm all the time. Which make the screen black when having a phone call. And double tap/lift to wake is not working(although my accelerometer is working according to sensors multitool).
I don't have screen protector, and this problem happened just after i first updated it to android 10. so i think it might be just a software problem.
I had the october update already, but it is not fixed.
And this is a phone that never oem unlocked or rooted, no trwp installed ever, so it might be a different problem rather than that FIXED one.
I live in a country that I could not send the phone back for repairing or replacement, and i have to use adb sideload to install every ota
(and most of time when I switch my camera to frontfacing camera, it will buzz and vibrate, but when i switch back to rare and back to front, it can be fixed. this is another small issue, but it happened before this update already, maybe i just need to mention it)
Any idea what might cause this and how can I fix them?
Thanks.
https://forum.xda-developers.com/showthread.php?t=3967525&p=80233629
TonikJDK said:
https://forum.xda-developers.com/showthread.php?t=3967525&p=80233629
Click to expand...
Click to collapse
i read this already and my issue is not the same one as mentioned...
in that issue, all sensors are dead, but not in my case.
my device is never unlocked or rooted, no twrp installed, so maybe nothing has right to write the persist?
and if it is the same one, it should be fixed in october patch, but mine is not FIXED at all.
zhangcx93 said:
i read this already and my issue is not the same one as mentioned...
in that issue, all sensors are dead, but not in my case.
my device is never unlocked or rooted, no twrp installed, so maybe nothing has right to write the persist?
and if it is the same one, it should be fixed in october patch, but mine is not FIXED at all.
Click to expand...
Click to collapse
I factory reset my device yesterday and it fixed a lot of errors I was getting. Have you tried factory reset?
Be sure the phone has backed up to the google drive

All issues Android 10 update xz2 compact

I think it would be useful to have a collection of all bugs of the android 10 update. From my point of view it is a disaster.
I noticed the following (after I factory reset it) :
Touch issues - touching the screen lightly does nothing. I have the actually tap it... This makes writing a pain, as hard to reach keys do not always register
Backlight auto adjustment issues - now it's very aggressive and basically stupid. I'm sitting in home, in the evening, almost without moving, definetly in the same spot and the backlight just jumps around in big increments
Lag and shutter in daily usage - a restart solves this for a couple of hours...
apps are now often reloaded - memory manager is too agresive and kills background apps
GPS NOT WORKING. It was flawless before update ?
build-in swiftKey keyboard does NOT remember how and where you type IF you change the keyboard layout /position (compact, split, side, etc...). This essentially makes it useless
A factory reset is not enough , try software repair using Sony companion
Im not having touch or GPS issues, but my phone is definitely slower and laggier since the upgrade to android 10. ALso my battery seems to be depleting faster. Is there any way to roll back to 9?
veverone said:
I think it would be useful to have a collection of all bugs of the android 10 update. From my point of view it is a disaster.
I noticed the following (after I factory reset it) :
Touch issues - touching the screen lightly does nothing. I have the actually tap it... This makes writing a pain, as hard to reach keys do not always register
Backlight auto adjustment issues - now it's very aggressive and basically stupid. I'm sitting in home, in the evening, almost without moving, definetly in the same spot and the backlight just jumps around in big increments
Lag and shutter in daily usage - a restart solves this for a couple of hours...
apps are now often reloaded - memory manager is too agresive and kills background apps
GPS NOT WORKING. It was flawless before update
build-in swiftKey keyboard does NOT remember how and where you type IF you change the keyboard layout /position (compact, split, side, etc...). This essentially makes it useless
Click to expand...
Click to collapse
Wifi is often lost and quickly reconnects
fingerprint sensor isn´t as sensitive as it was before
battery drain is bigger than before
bluetooth pairing with tablet doesn´t work properly...being paired: YES, but no connection at all...tried three different tablets...bluetooth headphones work!
The camera application is crashing when I take photos.... :crying:
I really haven't faced any of those issues. The fingerprint is the only things that have become laggy, the phone is louder now when playing music, camera works great even with unlocked bootloader.
You should try to do a clean install with newflasher my phone is even rooted and works great.
carloszf said:
Im not having touch or GPS issues, but my phone is definitely slower and laggier since the upgrade to android 10. ALso my battery seems to be depleting faster. Is there any way to roll back to 9?
Click to expand...
Click to collapse
Scratch that... I am experiencing all the issues from OP's post. It is especially severe when trying to use two apps at the same time in split screen.
Sony mobile engineers answer my bug report
Android Beam doesn't work (transferring files by touching two phones with NFC).
Nothing works on this phone any more!
I will never buy another Sony phone and surely I will advice others against buying such sh*t.
------------------
I contacted the Sony support in my country and they said "the download must have been corrupt" and I "should try to reinstall" via the Xperia companion (some kind of desktop app).
Mind boggling is the fact that this answer comes "directly from Sony engineers".
Now... I guess it is clear for everyone why they f*ucked this phone so bad. Their engineers think that a corrupt file can 1) be installed successfully 2) cause all these bugs...
Hamzakovsky said:
A factory reset is not enough , try software repair using Sony companion
Click to expand...
Click to collapse
Why factory reset is not enough?
If the corect procedure is to use that "companion", WHY they pushed the update via OTA?
veverone said:
Why factory reset is not enough?
If the corect procedure is to use that "companion", WHY they pushed the update via OTA?
Click to expand...
Click to collapse
The only brand who has this crappy issue is Sony ! Companion fills all the missing files or damaged files .. during the ota download and installation sometimes things go wrong
For everyone reading this thread: there is no such thing as instalation with corrupt or missing files.
All files in today's IT world are uniquely identified and double checked after download.
Their answear is only a way of not telling us that they f*cked up this + they think that we are stupid. Some of us might be fooled by this, but surely the majority won't be.
We have primarily the camera issue, a reboot resolves it temporarily.
Anyone managed to fix these issues with a fresh Sony companion install?
52.1.A.0.618 here. Fingerprint is slower and the battery drains faster while screen on. (Standby and deep sleep are both ok). Everything else is the same as Pie, at least for me.
Add me to list of unhappy xz2 compact owners. Phone is almost unusable since the update. More often than not the finger scanner only works when you press the power button first, it lags awfully in most apps, I get errors in apps I never did before, battery drain is about the same as previous. Overall this is my last Sony. Very very poor. Should add I did full companion restore and it made zero difference
I have to add my voice to this thread, short as it happily/sadly is. Since the update I've experienced a number of issues: Fingerprint scanner is less sensitive and sometimes doesn't work, the wake-up procedure is strange, in that the icons will appear before the background loads and even though I have security set to not show notification details on the lock screen, they'll reveal for a split second before waking up to the home screen, the camera is unreliable, the timer app doesn't reset or dismiss when appearing on the notification bar..
It's the first time I've ever emailed Sony Support on what was (and I hope still will be) my favourite ever phone. They of course just tell me to factory reset. Such a shame and I hope they fix it.
majorwedgy said:
Add me to list of unhappy xz2 compact owners. Phone is almost unusable since the update. More often than not the finger scanner only works when you press the power button first, it lags awfully in most apps, I get errors in apps I never did before, battery drain is about the same as previous. Overall this is my last Sony. Very very poor. Should add I did full companion restore and it made zero difference
Click to expand...
Click to collapse
I'm having the same issue. Not sure what is wrong. I have not factory restored my phone. That is ridiculous
I also add the bug of Google Assistant in Stamina Mode:
I always keep It disabled when long press home button, but when Stamina Mode turns on, Google Assistant switches on again automatically although in settings shows that is off.
wow its been 2 years since I bought the XZ2C, had issues with the wifi and data so I went back to android 8.0, and use it for O2 priority only. Came back to see if android 10 fixed the problems. Disappointing.
I am not surprised at all that Sony still hasn't fixed any of the issues.
With today's New Update the the voicemail-Record-Volume Bug is fixed.
Finally. Too good to bei true.
tyrael11 said:
With today's New Update the the voicemail-Record-Volume Bug is fixed.
Finally. Too good to bei true.
Click to expand...
Click to collapse
there are still a lot of vital features that were bugged in android10 and i´m not sure they´ll be adressed in the near future.

Fingerprint sensor not works with miui11

I have a problem with the fingerprint sensor.. Since I switched to miui 11 with android 10 the sensor worked at times. It works for a day or two, then the menu disappears from the settings and i can no longer use it.
I try tu update vendor partition, wipe data, format data, reinstall new rom with all wipes, reinstall stock rom with Mi FlashTool, any solution works..When i wipe all, it works for a while and than, suddenly, doesn't work anymore!!
I have Mix 2S, i'm sure that is not an hardware problem..
Replace fingerprint sensor
I don't know why you say that you're sure that it's not a hardware problem, but to me, it sounds like the sensor is broken. I suffered this issue in my own Mi Mix 2s and it was caused because the "cable" of the sensor was folded (it's not really a cable, it's more like a flat plastic connector) and it worked one day and not the next. I finally decided to fix it by myself, looking for a youtube video about disassembling the phone and with these tools and the replacement sensor it was pretty easy (and quite cheap, frankly). I hope it helps!
Kaliotto said:
I don't know why you say that you're sure that it's not a hardware problem, but to me, it sounds like the sensor is broken. I suffered this issue in my own Mi Mix 2s and it was caused because the "cable" of the sensor was folded (it's not really a cable, it's more like a flat plastic connector) and it worked one day and not the next. I finally decided to fix it by myself, looking for a youtube video about disassembling the phone and with these tools and the replacement sensor it was pretty easy (and quite cheap, frankly). I hope it helps!
Click to expand...
Click to collapse
I had the same problem. Mi mix 2s had a problematic/bad assembly line.
I have exactly the same issue. After Android 10 update the fingerprint sensor works for a while. After one day I recognized that the fingerprint sensor is not working anymore. And there are no options or settings in the system settings anymore. So I assume a software problem.
Jörg Krug said:
I have exactly the same issue. After Android 10 update the fingerprint sensor works for a while. After one day I recognized that the fingerprint sensor is not working anymore. And there are no options or settings in the system settings anymore. So I assume a software problem.
Click to expand...
Click to collapse
This problem is very boring!!! Have you try a solution, or a temporary fix???
No, I have no idea how to fix. Seems we have to wait till the next update from Xiaomi, which hopefully will fix the problem. It is really boring.
Jörg Krug said:
I have exactly the same issue. After Android 10 update the fingerprint sensor works for a while. After one day I recognized that the fingerprint sensor is not working anymore. And there are no options or settings in the system settings anymore. So I assume a software problem.
Click to expand...
Click to collapse
Your assumption is wrong... these options will not show up if the system can't find the fingerprint sensor... Had the same problem and it turned out to be a hardware fault, exactly like mentioned by Kaliotto. You can do a simple test via CIT (tap multiple times on kernel-version). You will find a fingerprint sensor check in there. If it does not find the sensor, it is broken, simple as that. Replacing the sensor is really no voodoo, did it in a timeframe of 30 minutes myself and it was really the first time I ever opened a smartphone. And the parts are really cheap.
cdfs said:
Your assumption is wrong... these options will not show up if the system can't find the fingerprint sensor... Had the same problem and it turned out to be a hardware fault, exactly like mentioned by Kaliotto. You can do a simple test via CIT (tap multiple times on kernel-version). You will find a fingerprint sensor check in there. If it does not find the sensor, it is broken, simple as that. Replacing the sensor is really no voodoo, did it in a timeframe of 30 minutes myself and it was really the first time I ever opened a smartphone. And the parts are really cheap.
Click to expand...
Click to collapse
I read on differents sites a lot of people who had problems with fingerprint sensor after upgrading to miui 11 with android 10..i don't think that all of us had hardware problem at the same time of the upgrading, it's very strange...
so, to avoid any doubt, i'm searching a new fingerprint sensor..the site suggested in the second posts seems to have problems with payment, any times i try to buy with paypal o credit card, the payment was refused..so i'm searching another reliable site..
I solved the problem. In my case it was defenitely a software bug. I tried to run the fingerprint test at CIT and the phone reminded me that the phone is protected by a PIN and can not enroll fingerprint information. So I switched of the PIN protection and the fingerprint test runs positive. Since that time, the fingerprint options in the setting was back again and I was able to setup the fingerprint sensor as usually.
So I thing the deactivation of PIN protection was the solution to get the fingerprint sensor working again.
Jörg Krug said:
I solved the problem. In my case it was defenitely a software bug. I tried to run the fingerprint test at CIT and the phone reminded me that the phone is protected by a PIN and can not enroll fingerprint information. So I switched of the PIN protection and the fingerprint test runs positive. Since that time, the fingerprint options in the setting was back again and I was able to setup the fingerprint sensor as usually.
So I thing the deactivation of PIN protection was the solution to get the fingerprint sensor working again.
Click to expand...
Click to collapse
So, you only disabled pin in the lockscreen (and set swipe method to unlock the phone)??
I tried now disabling pin and restarted the phone, but no options in the settings menu
Can you give me more details? Thanks
Update! After one day of use, I have to say, that the fingerprint sensor still does not work proper. After a while the fingerprint sensor stops working again. I played around with the settings, disabled the PIN protection and start the phone several times and than the fingerprint sensor was working again for a while. There is still something wrong. Also the CIT test sometimes pass and sometimes fail. Maybe it is hardware failure after all.
What I did: I disabled the password (PIN) protection, means no protection at all. After that I was able to run the fingerprint sensor test at CIT ( as cdfs wrote). This test was pass and the settings to configure the fingerprint sensor appears again in the system settings and the sensor worked for a while.
Since this procedure the function of the sensor is not consistent and I can not definitely say what to do to get it works. In the meantime I think that all the described workaround just works by accident.
NEWS: i changed stock kernel with two modded kernel (Twisted v22 && LawRun9.0_60hz) and fingerprint start to works again!!!
So, my idea was real: it's a software problem!!!!
Try it yourself and give me your feedback
Hi,
I had also the issue that the fingerprint sensor was not recognized. I replaced it.
Then the option was there again but it doesn't read any fingerprints.
The CIT test fails by the last step "Pixel open test"
Then I got a second new fingerprint sensor and replaced it again.
The test fails again in the last step!
These are the CIT messages:
Autotest: Testing
SPI test: Success
Reset pin test: Success
Interrupt pin test: Sucess
Pixel open test: FAIL
So I would say it is a Software Issue
Hello,
so I at the end found some users, having exactly that problem!
I bought a new sensor and changed it. Pixel Opem Test failed.
I bought another sensor with the same result: Pixel Open Test failed.
Is there a usefull solution?
Mi Mix 2s MiUi 12 xioami.eu
fefuzzo said:
NEWS: i changed stock kernel with two modded kernel (Twisted v22 && LawRun9.0_60hz) and fingerprint start to works again!!!
So, my idea was real: it's a software problem!!!!
Click to expand...
Click to collapse
I had a try with twisted kernel V28.
Unfortunately it dind't solve the problem for me
meeven said:
Hi,
I had also the issue that the fingerprint sensor was not recognized. I replaced it.
Then the option was there again but it doesn't read any fingerprints.
The CIT test fails by the last step "Pixel open test"
Then I got a second new fingerprint sensor and replaced it again.
The test fails again in the last step!
These are the CIT messages:
Autotest: Testing
SPI test: Success
Reset pin test: Success
Interrupt pin test: Sucess
Pixel open test: FAIL
So I would say it is a Software Issue
Click to expand...
Click to collapse
Hello currently I am using mi note 9 pro but I am having fingerprint issue there is fingerprint option missing I am not able to mange fingerprints. Plz somebody help me

Mi Note 10 weird screen issue (ghost touch?)

Hi all,
Just got this Mi Note 10 today and while setting up the phone I started to get those weird screen touches..
Happened so often that I enabled 'Show Taps' via developer options and recorded it here:
https://imgur.com/a/T2Otpht
>> Is there anything I can do about this? Not sure if this is a Hardware or Software fault?
Any thoughts welcome!
thanks
tibrocks said:
Hi all,
Just got this Mi Note 10 today and while setting up the phone I started to get those weird screen touches..
Happened so often that I enabled 'Show Taps' via developer options and recorded it here:
https://imgur.com/a/T2Otpht
>> Is there anything I can do about this? Not sure if this is a Hardware or Software fault?
Any thoughts welcome!
thanks
Click to expand...
Click to collapse
Okay, this is weird. Which version is it? And did you have already tried to reset your device? If it's still there it's probably a hardware defect.
ItsBen12000 said:
Okay, this is weird. Which version is it? And did you have already tried to reset your device? If it's still there it's probably a hardware defect.
Click to expand...
Click to collapse
Model version M1910F4G
MIUI version MIUI Global 11.1.1 Stable (QFDEUXM)
Did a factory reset and was doing the same thing...
tibrocks said:
Model version M1910F4G
MIUI version MIUI Global 11.1.1 Stable (QFDEUXM)
Did a factory reset and was doing the same thing...
Click to expand...
Click to collapse
Well, I had the same MIUI version and region. I bet it's not a software problem. Just send it back
ItsBen12000 said:
Well, I had the same MIUI version and region. I bet it's not a software problem. Just send it back
Click to expand...
Click to collapse
Right, so no fix really... disappointing as the cameras are impressive
My device came shipped with Android Pie Based Miui 11, no screen weirdness. Just after the Android 10 updates that ghost touches appear. So I guess it's just software bug.
me too, sure software problem.
Thanks for the feedback, if software-related were you able to roll back to fix this?
Happy to try a workaround as I'm very reluctant to send it back..
worth a try though, but unfortunately Xiaomi didn't provide stock ROM specifically for my region so I left with no choice
Completely puzzled as I did a Factory Reset via Recovery and haven't seen the issue for past 2 days, I've left the screen touch tracing on and no 'ghost touch' was recorded..
so I don't know what to believe anymore, got an open return ticket but would hate to send it back without needing to..
how can I make sure issue is gone?
Hi, i had this problem 3 weeks ago, temporary solved with hard reset, worked perfectly until yesterday night when this problem went back.
Hard reset again, problem still there.
Someone solved it permanently?
It is really weird because, if i turn off/on the display, sometime works sometime not :S
The phone came with Android 9 and I started to face this after updating to Android 10. The issue is not extreme as shown in the video, it just the touch becomes slow to respond and hard to type fast with the keyboard. Turning off the screen and turning back on solves it temporarily sometimes.
I tried disabling on screen fingerprint and the problem seems to be reduced now. Definitely a software bug
I'm using Mi note 10 lite it also has same problem. Sometime touch freezing and after press power button automatically fix. Some time need to restart. And also one person told me he is fixed by this issue by turned off fingerprint sensor.
UnlimitedBB said:
The phone came with Android 9 and I started to face this after updating to Android 10. The issue is not extreme as shown in the video, it just the touch becomes slow to respond and hard to type fast with the keyboard. Turning off the screen and turning back on solves it temporarily sometimes.
I tried disabling on screen fingerprint and the problem seems to be reduced now. Definitely a software bug
Click to expand...
Click to collapse
I have the exact same problem as you, slow to respond and hard to type. Need to apply more force on the screen for it to respond. This happened randomly throughout the day but are more common during night time for me.
I think it has something to do with the screen lock pin or fingerprint, by changing the screen lock from ie pin to pattern or turning off fingerprint print seems to temporary fix the issue. Another solution is to reboot the phone. I'm using Note 10 Lite btw.
BengCurd said:
I have the exact same problem as you, slow to respond and hard to type. Need to apply more force on the screen for it to respond. This happened randomly throughout the day but are more common during night time for me.
I think it has something to do with the screen lock pin or fingerprint, by changing the screen lock from ie pin to pattern or turning off fingerprint print seems to temporary fix the issue. Another solution is to reboot the phone. I'm using Note 10 Lite btw.
Click to expand...
Click to collapse
I am using the Pro version. Looks like this issue is common for all the phone models in the Note 10 series. Yes, I have noticed that this issue often happens at night.
Try switching off MIUI optimization under Developer Options and restart your device. Then switch it On and restart again. This workaround solved my issue.
https://imgur.com/a/vbvsiyy
CharlesJFRq said:
Try switching off MIUI optimization under Developer Options and restart your device. Then switch it On and restart again. This workaround solved my issue.
https://imgur.com/a/vbvsiyy
Click to expand...
Click to collapse
This fixed the issue for a few days and it started to reappear again. When the issue appears, if I turn on Game Turbo for any app (eg: WhatsApp) that particular app doesn't have this touch issue. Looks like a software optimization or battery optimization of MIUI is causing this issue
UnlimitedBB said:
This fixed the issue for a few days and it started to reappear again. When the issue appears, if I turn on Game Turbo for any app (eg: WhatsApp) that particular app doesn't have this touch issue. Looks like a software optimization or battery optimization of MIUI is causing this issue
Click to expand...
Click to collapse
What firmware version are u in?
I'm currently at 11.0.16.0 and fortunately this issue did not yet reappeared after the workaround.
This is definitely a software ISSUE with MIUI.
CharlesJFRq said:
What firmware version are u in?
I'm currently at 11.0.16.0 and fortunately this issue did not yet reappeared after the workaround.
This is definitely a software ISSUE with MIUI.
Click to expand...
Click to collapse
MIUI 11.1.3.0 Global Stable
Will try out the MIUI optimization to see whether issue still arise. I'll see if my game turbo have the same issue as you too.
I'm currently at 11.0.7.0 (Mi Note 10 Lite)
Edit: Mi optimisation doesn't work for me but the Game Turbo trick do work.

Fingerprint enrollment

Anybody get the fingerprint enrollment to work without sending phone back to OnePlus. I have tried just about every fix I can find on other threads with no success. I installed the latest OS 11.0.5.6 AA and I think it got worse. Can't even run the calibration tests. My fingerprint has been broken since I got the phone new from OnePlus. I don't really use it at the present but it would be nice to have working if I decide to sell phone later.
By broken do you mean its not detecting your fingerprint? are you using a screen protector? If you send it to OnePlus with a Lock on it they will refuse it and probably keep it if they follow Sammys practices...
never gets to the point of detecting fingerprint. just error message that enrollment not complete.
Is this only in the first set up screen or even when you go through the settings to ass fingers?
The only issue I have with my FP reader is sometimes when I first unlock the phone I have to place my finger/thumb directly center and use relatively firm pressure to get it to unlock. If I relock the phone (using double tap, or the power button) and then double tap to unlock right away the reader works much better. I am not sure why it only appears less reliable after the phone has been locked for some time...( i have not done any time lock experiments). Also, after the phone is unlocked and I use the FP reader for anything else...like a banking app, of whatever else...it works flawlessly and responds very quickly as expected. I am not sure why it only acts "funny" after being locked for some time. It's almost like something is going into a deep sleep while being locked???
At any rate, what you are describing sounds much different, even though it might somehow be related to the whole FP reader issues. If mine was acting as bad as your I would demand a return, repair, refund...whatever it takes to get the issue fixed.
Got it to work. I had pulled persist img when I first received the phone and unlocked. I flashed the old persist.img using fastbootd and got fingerprint to enroll. I use a tempered glass screen protector and it took awhile to get it enrolled but works good now that I have a fingerprint entered.

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