For the level 33 personal story quest “Bad Blood” which takes place in the windy tunnel my story did not continue and trigger when entering the room with the Sons of Svanir. After defeating the mobs and walking around the corner, my story triggered the fight; however, I had already defeated the mobs and was unable to continue my personal story.
After re-entering the personal story instance and completing everything up until that room, I walked around the corner to trigger the fight before engaging. As a ranged character, I took quite a few hits, but survived and moved on. It appeared as though my quest still didn’t trigger, but this time around I was able to talk to the magister and proceed to make my decision.
This happened on a level 35 male Asuran Elementalist.