Looks like z-fighting to me. That's what happens when you have two or more planes in the same place at the same time. Try moving one of the faces slightly off from the other. Even as little as 0.01 difference is usually good enough to make it stop fighting.
For some reason it only happens in 1.16, but any other version its fine: [White area under wheel]
What would cause this?
Looks like z-fighting to me. That's what happens when you have two or more planes in the same place at the same time. Try moving one of the faces slightly off from the other. Even as little as 0.01 difference is usually good enough to make it stop fighting.
I hope that helps you.