Hey Czar,
Found something that I think is worth looking at.
I am looting bones and burying them (tried both at variable numbers + full inv), but I also have the "move mouse outside screen" setting active.
Together, it burys a bone, flys around the screen then off screen, comes back clicks a bone, flys off again for a while, comes back burys one bone.
It's pretty erratic, and unrealistic IMHO. I think when it starts burying bones, it should finish all bones to look realistic.