Ui 8 keeps restarting

[donutjam]

My phone keeps restarting if left locked and screen off but ive just upgraded from a s21 fe to a s22 ultra it was ok up til i done a software update 

[Tourbillon De La Vie]

Does it still happen in safe mode
https://www.samsung.com/uk/support/mobile-devices/how-to-start-my-galaxy-device-in-safe-mode/

[donutjam]

What's that and how do u put it in safe mode

[OmegaMutant]

The link provided details how to enter Safe Mode. Simply put, if the problem doesn't happen in Safe Mode then its likely an app causing the issue

[donutjam]

Oh what app if so

[AndrewL]

@donutjam: It won't be possible to identify which app is responsible, therefore I recommend removing any recently installed apps (those that were installed around the time you first encountered the issue) and utilising a process of elimination. 

[Piper123]

Could be any of your apps that you've downloaded.

No way for us to know that given there are literally millions of android apps in the Google Play Store.