Please ensure your phone's software and apps in the Playstore and Galaxy Store are updated @Kr1ska7a
Assuming you don't have the Auto Restart turned On I would first try Safe Mode to see if the issue stops when in that mode.
If it does then an app or theme you've downloaded is causing issues.
It's then a process of coming out of Safe Mode and then deleting your downloaded apps one at a time until it stops.
If it continues in Safe Mode then clear the phone's system cache files partition.
And you can run a diagnostic test via your Samsung Members app under the GetHelp section.
If that does not help then the next step coukd be a factory reset.
> https://www.samsung.com/uk/support/mobile-devices/how-do-i-clear-the-cache-on-my-device/ You may need to hook up to a Computer or insert your earphones to enter into recovery mode.
> https://www.samsung.com/uk/support/mobile-devices/how-to-start-my-galaxy-device-in-safe-mode/ will help to highlight if an app or theme etc is potentially causing issues.
Finally a Samsung Service Centre can check out the phone.
Daily Driver > Samsung Galaxy s²⁵ Ultra 512Gb ~ Titanium Black.
The advice I offer is my own and does not represent Samsung’s position.
I'm here to help. " This is the way. "
