Guild Wars 2

I encountered a bug in this mission where the objective of “Defending the haven from Sagum and his thralls” does not complete, even though all the thralls have been dispatched of, and Sagum being the only one left, has a spell making him immune to all damage for 23 hours, making it seemingly impossible to clear. Unless you wish to wait for 23 hours that is.

Attached screen shows all the NPC allies ganging up on Sagum but doing little good.

I am having this same issue. It appears there are multiple threads on it. Hope they resolves it soon.

Also having this problem.