Was on mission 3 of a deep archimedia run, nearly finished with the disruption. Shadow Stalker spawned for some reason (I thought he wasn't able to do that in albrecht's lab??), sealed all the doors in a tileset that had no way to unlock them, and refused to leave even after killing myself and one other squadmate. This resulted in the two surviving players being trapped in a room, with no options but to let the enemies kill them to end the mission. Afterwords, despite the mortis strike claiming we would not lose rewards, we left with only a fraction of our earnings from the run.
Extremely frustrating.