Factory reset your phone, after your One UI is upgraded. Hopefully it'll help you get rid of most of the problems you're facing right after the update. But don't forget to keep a backup of your device data before your perform the factory reset.
We apologize for the inconvenience caused to you. We would request you to kindly send us the screenshot, video and error log file with in 15 minutes of issue occurrence through error report section from Samsung Member Application:- Samsung member application > Click on get help > Send feedback > Error report, so that we can help you out with this.
