The issue

When I created a new world, I saw the trees and caves has a lot of the shadow bug, I know that's on Java Edition and others, but, here is more masive or more common to have that bug.

How to replicate the bug

1. Create a new world
2. Search a forest, taiga or a cave.
3. If you don't see that bug in there, search another.
4. This bug is more frequent if you charge new chunks. That's means, go away of the spawn.