We haven’t seen widespread reports of haptic feedback or vibration occurring when Adaptive Brightness adjusts to 100%, but your note is appreciated. It’s possible that this behavior is triggered by another system event occurring simultaneously, or by a third-party app interacting with brightness changes.
If the vibration continues and feels directly tied to Adaptive Brightness, we recommend submitting an error report via the Samsung Members app so our team can investigate further.
Appreciate your detailed attention and for helping improve the One UI Beta experience!
