Hello! Try these steps...they are working as a workaround to troubleshoot this issue:
Change the screen display resolution To change screen resolution, please go to device “Settings -> Display->Screen resolution”. Or simply search with “screen resolution” in Settings.
Turn off optimized power mode For power saving mode, please go to device “Settings->Device maintenance->Battery”. Or simply search with “Power saving mode” Make sure it is on HIGH PERFORMANCE mode
then restart phone. see if it is working with those steps. (:
... View more