So we just completed the second encounter at the pistons. where there are no adds you just have to jump from piston to piston breaking crystals, and when we completed it no one got a loot drop. it counted as completing that step because I left and went in by myself and I have the checkpoint at the bottom of the steps before you go into the treasure room. we all look at the circle at the top of the steps for a chest and its not there. so all six of us got screwed out of a loot drop. does anyone know if this is a known issue or if I did something wrong?