I first saw it happen to EP, I just thought they where turning them while I was shooting at them but then mine just did the same thing at Carmella, I placed it down to hit people on top, I looked behind me ( but didn't fire ) and it spun round and fired, I have the camera on FREE so it shouldn't have spun like it would have with CONSTRAINED
And I asked in Zone and a few said it was happening tot hem also