I have the same issue (galaxy s10 lite )sometimes after update sometimes it happens randomly. The fix for me is a lot of hard reboots and restarts . Last time it was after the security update I tried everything and I came to a conclusion that the bug is because some loose connections on the back of the phone because the fix for me was when I punched the back of the phone (light punch) and then restarted it everything was working normally! Next time I'll open the back cover to see if there is any loose connections ! Very annoying Bug !