Earthen Waterworks bug

 I am doing a T11 Earthen Waterworks. The active quest is to find and dig up 4 treasures. I cannot complete the delve as I have made it to the 3rd dig spot. Started the fight and 2 mobs attacked me. I killed them and now I still don't have the progress and no more enemies have spawned. I try to talk to Pagsly and he says that i need to defend him. Effectively my entire delve is bricked. Which is incredibly annoying. Is there an actual fix to this coming or should I avoid this delve completely? I am going to try killing all the npcs in the room to see if that un-bugs the fight.

EDIT: So killing all the mobs in the room actually worked and I was able to progress. The mobs got hit by the zekvir shades immobilization. Hope that helps anyone else with that problem.