For some reason. some of my displacements are not solid in the sense that dead bodies, grenades and prop_physics_multi fall through it. THe ground is visible and you can shoot it and walk over it. But when a person dies over it they fall through and they just keep falling. THis onyl happens with random displacements. And i move a hay bale over it and it just disappears. If you guys dont know whats wrong or i am not clear enough i will make a quick video for you.

Basically what the haybale does is it just falls down at a certain point as if it were going of a cliff.

Please help me.