I have a note 20 ultra 5G unlocked on Verizon. I recently ran into a problem where a few of my apps just kept on crashing and some were just literally freezing up. After doing a restart and clearing the cash they worked for maybe a half an hour and then started crashing again. I ran a diagnostic trying to find what was causing the issue and nothing was found. I was thinking about doing a complete reset but decided to just do a settings reset. It worked perfectly. Whatever new setting that ui5 had implemented this corrected it. Before doing a complete data wipe I would consider trying this.
I and many others I know on Samsung devices after the OneUI 5 Android 13 update are having several issues! It seems a data/internet connection cannot be had, even when you have 5G connection and full bars for the reception. Sometimes even on wifi - Restarting the phone works but 5-25 min later same issue and apps crash or do not work due to loss of data connection!
Has about 33% faster battery drain we notice too now. I am trying to see how widespread either or both of these issues are!
It's been two days and I was having pretty much the similar problems as you. Of course I don't get 5G in my area because of eglin Air Force Base blocking the area but my 4G LTE is very fast. But after doing a settings reset because something was obviously conflicting with other apps it seems to be working perfectly.
