Ok so....its been a while since I had any issue with the s21 ultra or android until I updated it to the latest software: android 13 one ui 5.0.
So far I've noticed a major and irritating problem.
It's the phones orientation. When phone held in portrait position, and the auto rotate is on auto mode, the phone camera app, chrome websites, and actually any other apps that allow the orientation options in landscape and portrait, the phone keeps turning landscape when the phone is held in portrait. VERY ANNOYING.
all pictures are coming out in wrong orientation. Can't look at websites
unless I lay the phone flat.
When the auto rotation is turned off I can use all the apps in portrait mode except the camera still switches orientation the wrong way around.
Sometimes you still have glitches after big updates & the reset fixes them. In my opinion, remember I have the s21 ultra android 13 & don't have any issues, because I follow a procedure of doing a factory reset after major updates. I personally don't have that issue, the rotation works how it's supposed to.