Solved! Go to Solution.
Same issue with my Galaxy A71 (SM-A715F/DS), Android 10, One UI 2.5.
With adaptive brightness on, sometime screen brightness going down then recover at same level. No change in lightening condition but brightness keep fluctuates down and up until you change mobile position.
I have also Factory Reset my device but issue still the same. No sure is it Android /One UI/ Hardware issue..
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