I noticed this when I opened discord this morning and it wouldn't connect at all despite having full bars on wifi, had to turn wifi off and use mobile data, then restart phone to get it working again.
I had this problem all the time. Seemed like every morning I would wake up and it would say wifi connected but my internet wouldn't work. I am confident the underlying issue was with my old router. I had searched the internet for countless hours with no solution. It wasn't until recently I moved house and ended up buying a newer router. (Not specifically for this issue but because it was time to upgrade) It has been several months and the issue has not come back, so at least in my case it was all to blame on my old router.
Please try clearing the system cache and rebooting your device.
If issue persists, please send us an error report with screenshots from One UI Beta App (Beta Feedback -> Send feedback-> Error Reports -> "Select Category" -> Input frequency and Description" -> Send (Top Right Icon). We appreciate your help for supporting beta program.
I feel like @zoruaboy and @sbxm are discussing different issues. I've experienced both.
In @zoruaboy's case, prior to the beta there were mornings I'd wake up only to find the wifi was turned off on my phone. I reconnected to the wifi with no issues and spent the day on wifi. The next morning, wifi was off again. I don't think it's a router issue because my wife has the same phone and hers never turned off wifi. If I did a network reset in the settings menu, it would keep its wifi connected overnight for a month or so, only to start again at a later date. I goggled it and it seems to be a common issue with the S10s.
Oddly, the nightly disconnects haven't happened since the Beta. But now I have had @sbxm's.
This wifi issue with the beta is one where the wifi disconnects randomly. And when you go to reconnect to the wifi, there's no networks listed. The phone can't find any of my wifi networks.
I have to toggle airplane mode on and back off or reboot the phone for it to show the available wifi networks and reconnect.
Well I don't have any issues anymore, but when I did, my wifi would tell me it is connected to my network and i could even see other networks but nothing internet related would work like loading websites. But as soon as I toggled either wifi or airplane mode off and on again my websites would load and I would even occasionally instantly get some notifications come in like youtube bell alerts. Strange for sure, but I think my router was just giving up on my phones specific IP after some time of inactivity. New router no problems.
