Power phone off completely.
Then hold volume up and power button until you get a weird menu that's what you want.
Select WIPE CACHE PORTION and your phone will restart.
Hopefully that helps.
Thank you for your feedback. If you haven’t already, please send us an error report to help us debug the issue. Please also keep an eye out for any other issues you may encounter. We apologize for the inconvenience and appreciate your contribution to the beta program.
One UI Beta Team