I found a bug this evening on the PTS involving the Tigerclaw alt fire. The bug occurs when being downed while charging up an alt fire orb, but I didn't see if it was during the green charge up phase or in the red (ready to fire) phase. When I was downed while charging the alt fire and a squad-mate resurrected me, I would immediately fire an alt fire orb into the ground and be downed again. This occured without any input from my mouse or keyboard at all. It happened to me 3 times so I think it should be easy to reproduce.