Strange WiFI issue causing rebooting of my S8+ - Samsung Galaxy S8+ Questions & Answers

Hello there!
I'm been having a strange problem with my device, which causes a semi reboot.
I mean semi, because it appears to be rebooting, but it's faster and it seems to not complete the whole rebooting process.
I've been investigating and discovered that it's related to WIFI.
I have a Archer C9 with 2.4 and 5Ghz wifi. Each is set to a different SSID, so I know which band I'm using.
My S8+ is a FD Exynos at ZTO/CRC7 Oreo.
There's a option in advanced settings of wifi section, that automatically alternates from wifi to mobile, when wifi signal is weak.
So I found a spot in my bedroom where the S8+ loses wifi signal for a moment, but it's sufficient to make it alternate to LTE, either in 2.4 or 5Ghz bands (even though the 2.4 Ghz gets 40~50% signal in that spot).
After that, the cellphone keeps saying that wifi is weak and won't let me reconnect to it, even if I'm close to the router.
After a minute it reboots and connects to the wifi.
I disabled that option and so far (15h) it hasn't rebooted yet, even if I go to that spot (it loses wifi signal there, but recovers after a few seconds)
Is that a software issue or a hardware issue?
Thanks a lot in advance!

seems like a software issue since it works after reboot
try resetting the phone to factory defaults

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jondwillis said:
Data stops working on all tethered devices as well as the Nexus 5. Entering airplane mode and then resetting the WiFi tether fixes the symptoms, and if that fails, restarting fixes it.
Click to expand...
Click to collapse
I am having the exact same issue -my post- in a completely different place, only I have been assured it is completely fine to use my phone on the network in this way. Did you ever find a solution to this?

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Got a new S8+ yesterday.
Everything is fine except WIFI, it keeps disconnecting all the time, going on and off, until it finally stops working...
I tried removing all background signal checking and all unnecessary options, and also I did reset it to factory twice, but the problem persisted...
I have my former S7 Edge on the same network without problems...
I am having the same issue. Disconnect then reconnect every few min.
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Sent from my Samsung Galaxy S8+ using TapaTalk Pro
Check your network settings; it may be switching between LTE and WiFi to "conserve energy, buy having the strongest connection." I have had that issue in the past with other devices.
bigbad614 said:
Check your network settings; it may be switching between LTE and WiFi to "conserve energy, buy having the strongest connection." I have had that issue in the past with other devices.
Click to expand...
Click to collapse
Tried that already, but it is completely disabled..
In fact
Nearby Device Scanning is OFF
Wifi Calling is OFF
Location is PHONE ONLY
Smart Network Switch is OFF
Network Notification is OFF
Hotspot 2.0 is OFF
Keep WIFI on during sleep ALWAYS
and it is still happening.....
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Me to having same issue with WiFi disconnect automatically getting irritated from that
How to fix this guys
Had the same problem on mine. Setting the IP address to a Static IP fixed the issue.
Try going to settings, backup and reset, reset network settings. See if that works.
Sent from my SM-G955U

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I have the same problem, mainly in LTe but sometimes also in Wifi
ANyone found a workaround ?
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