Can't Progress

I defeated the end boss of the excavation area, Benedictus, First Herald of Utopia, in act 3 and immediately after, died, and the npc's that were supposed to spawn there are not showing up for me to continue with the game. I have a 24 sec video I can make him spawn again with the respawn at checkpoint button but he shoots out of frame at the end of the animation and I'm left alone with no way to move forward.