[PC BUG] Geoff is stuck

Some time during the 2nd stage of the boss fight with Geoff (after you drop his health to 3/4, then fumigate), he got stuck near his original spawn point. He wasn’t attacking or spawning minions. After I brought him to 1/2 health, he put up his shield but didn’t move to the next area, and the doors didn’t open. I had to quit the mission because I couldn’t finish the fight.