Restarting overnight since update

[Squinton]

Since I updated my phone (S21 FE) on 21st December 2023, my phone has turned itself off over night whilst charging. I've checked the battery status and cable charging in device care and they're both fine.

Has anyone else experienced this or is aware of a fix? I rely on my phone as an alarm clock so it is pretty annoying!

[keith30]

Have you switched auto optimization setting on, if you have it restarts the device when it's left being idle for long periods.

[Squinton]

No it's turned off, this issue has only been happening since the recent update. I've had the phone for over a year and never experienced it until now.

[kmroy]

Same here, seems like samsung pushed bug through the update deliberately. For me it has become worse, phone restarts automatically at very frequent time interval.

[Squinton]

Seems that way, I've still not found a fix.