I have been playing with instancing, here is something I found. I made 4 rocks then I instanced them with 150 density. I got a clump of rocks, I ungroup them then I 2d disperse them; they are in the air floating so I hit the downward arrow.....I t crashes Bryce everytime! If I manually push then down as a clump and then disperse them Bryce is ok.

Anybody has experienced the same?