Search Dynamic in your phones settings and you should see a screen like this. that top option will turn it off. It's extremely annoying, and takes too long to find where to turn it off.
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.
