In the normal world.... Where else?
You gave a vague answer. You could just tell us WHERE exactly you're placing it on. Bricks? A plate? Inside modter? Give me a break.
The moment i start the game
Ah another vague answer, that doesn't help us at all
My assumption is that you have the newer version of OpenAL32 dll and I heard it can cause math issues (resulting in floating/overlapping problems) - If this is not the case I would still post a log