I have a simple animation where there's a concrete number sitting on the road and another number crashes down on it. I'm using Voronoi Fracture to break up the bottom number on impact.... which works fine. The problem is that the broken pieces continue to move around for many seconds after they seem to have settled in their locations. Not bouncing around, just moving a little bit and not every piece. Looks a little like there's a small animal in the mess trying to find a way out. I've tried everything I know (limited); margin, friction on the floor, heavy gravity... nothing works. Any suggestions?