A group I was in had just finished the boss fight against Alyce Sinner turned into a nightmare as her fear level reached 100. As she got knocked out, we moved on to Scarecrow, who pretty much just stood there as we burned him down. Following this, we got stuck in the boss room while crows kept coming down and doing slight damage. We had no way of getting out of that other than letting the crows VERY slowly kill us, or just disconnecting from the game. One of us disconnected, and succeeded in kicking us out of the instance as well once invited back in. Once we all got out of the room, one way or another, the boss fight simply restarted. We'd had enough by then (since it takes ages to wait for the counter to get there, and that was the only reason we were doing the alert at that point), so we didn't try to see if it would work properly the next time. Two things of note: During all of this, the bug where sound effects occasionally cut out had kicked in for me for a couple of alerts (having been triggered by a large amount of adds onscreen in an Oolong speedfeat earlier), and during the fight there was also an almost-dead frightened inmate add on the other side of the door, trying to get in. Killing said add didn't help things. It feels like what happened was that Scarecrow got killed before he could disappear and reappear, and that confused the game.