Quickly re-enter the game at the moment when you retreat to the background. Later, it will lead to rendering errors and the glass will not be visible. I can't guarantee that other versions will have this bug. Maybe it is my mobile phone.
MCPE-225962
Entering the game at the moment of retreating to the background will lead to rendering errors later.
Resolved
Duplicate
1
Can confirm, happens this in nintendo swich if played a bot a world will appearing this black circle not like this but black you can see the blocks.