Google Pixel phone users are experiencing a bug where the screen shifts from too bright to too dark while watching fullscreen videos.The issue is not limited to a specific model, with reports across various Pixel phone versions.Users have tried troubleshooting with display-related features like Adaptive Brightness, but found no effect on the problem.Turning off the Smooth Display feature has been a temporary solution to prevent shifting brightness levels, but it disables the 120Hz refresh rate.