Even when this is the only mod I have in the mod folder, the issue occurs. The chunks aren't loaded properly, the blocks are invisible but can't be interacted with (broken or placed). Mobs will appear. You can see caves in other chunks. Not sure if it makes a difference, but these chunks were pregenerated and are just being loaded, not generated.

minecraft 1.18.1
fabric loader 0.12.12

What version are you using?

Closing due to inactivity.