So I created a space in Unity and for some reason when the player goes in certain areas, an invisible collider seems to appear. The player can't go past a certain point and is stuck in the area behind it. I don't have any invisible colliders in the game at all. The only javascript I've implemented is for a door trigger, but the invisible colliders and the trigger seem to be unrelated. The only thing the invisible colliders seem to have in common (I've found 4 so far, and the scene isn't very large) is that they're all on the outer edge of the plane the scene is on.
Any ideas what it might be?