start debugging by creating the object high enough above the ground

vector(10, 20, 30), -> vector(10, 20, 300)

Might be caused by the object beeing spawned already inside the terrain.

Some small recent games of mine:
Griefer 4k http://damocles11.byethost9.com/griefer4k.html
Kobold 4k http://damocles11.byethost9.com/kobold.html
Cave 4k http://damocles11.byethost9.com/cave4k.html