Once you go to Settings → Video → Graphics Mode, you are unable to change to other graphic modes and is stuck in Vibrant
MCPE-222677
Vibrant Visuals - Unable to disable function
Resolved
Cannot Reproduce
0
You need to exit the world and disable Vibrant Visuals from the main menu. If you want to be able to do this while in a world, enable the "Allow In-game Graphics Mode Switching" option from the main menu.