Was Laranthir alive? He triggers the next step, if he’s downed it won’t proceed until he’s revived and continues on his path.
He hadn’t even showed up. I restarted the game, and the event. However, I did one thing diferently: between the "Kill the Risen around the Searing Cauldron " (which was marked as completed) and the " Contact Arda using the communication relay golem", I went down the stairs to the east and there were still mobs there, some raptors and another risen, but the “Kill the Risen…” stage was marked as completed nonetheless.
So to sum up, the game assumed the “Kill the Risen…” stage was completed – when it shouldn’t – , I moved on to “Contact Arda” and then to “Kill the remaining Risen..” that went on and on in an endless loop.
