When I enable the “Vibrant Visuals” option in the graphics settings, the screen turns completely black except for the jump and movement controls. The game becomes unplayable as no other visuals are displayed. This happens consistently on my Samsung Galaxy S24+ running One UI 7 with Android 15. Disabling the option restores normal visuals.
This issue is being tracked at MCPE-203972. It will be fixed in 1.21.90.