Please try clearing the system cache and rebooting your device.
If issue persists, please send us an error report with screenshots from One UI Beta App (Beta Feedback -> Send feedback-> Error Reports -> "Select Category" -> Input frequency and Description" -> Send (Top Right Icon). We appreciate your help for supporting beta program.
I noticed too, particularly in my app switcher, that it was laggy and choppy. I sent a feedback report about it when all the usual steps didn't fix it and everything else is smooth and not slow or laggy.
