my friend doesn’t want to ask this question so ill ask it for him
his floors turn black in certain areas but are fine when your in other areas
if anyone has a fix please tell me and ill tell Mr. Monkey
i have this issue too, sometimes the lighting is broken in general where there is only half a area that is lit and the other isnt.
here is a image i took from my phone in a room called “^DeepDark”
i asked one of the rr staffs if it is fixable and they said that the mobile GPUs arent standardizes like how PC GPUs are.
unless there is a way to fix this, im not sure this will be fixed anytime soon 
i think i was able to fix this by either using less light objects or make them so they arent as clumped together
Have you tried subdividing your plane? If you’re using the Maker Pen, try splitting your floor into multiple smaller cubes. Mobile/Quest platforms use vertex lighting, which won’t work on large shapes/meshes with little to no subdivision.
Ill tell my friend to try this
I had the same Problem when I was creating a Game, When I was making the Game I was making the road very long, When I made the road too long, It was very shaded Into a black color, & It messed up the Game, But like @Jay said, Turning It into smaller sizes not Just one massive piece, It works because I tried it Before, Sadly I scrapped the Game Because of this Annoying little bug 
I am also having the same issue it is because there are too many lights affecting one shape/part try subdividing it and see if it works
Are you able to look into fixing this or adding more lighting options to devices like quest 3 and other platforms because they are higher end and they might be able handle more voxels (this lighting bug happens even on PC and all platforms)
