Hole In Terrain Cedrus Forest

There is a rock on the side of the mountain that is missing a side. You can walk right into it and be hidden from the outside world as well as walk right through the wall to exit the rock.

There's no pathing blocker or texture to one section of a rock so it lets you freely walk through it

There is supposed to be a wall (or side of the rock) that would prevent you from walking through it.