title: Character fall through ground after playing sometime
body: <p>I have a character with compound collider setup (the collider that is setup by many primitive collider shapes, one for each body parts), and a simple ground that is setup using a scaled cube. The cube is scaled 1000 in x and 30 in z axis. Things are still in early stage, so there is no expensive graphic, there are just primitive shapes and a low-poly character in scene. Things are going fine at begin, but for some time, after I play for a while, the character start falling through the ground. Anyone has encountered this problem and know how to fix this?</p>