This actually still seems to be an issue. I solved it by logging out and in a few times, resetting the instance each time. Basically the part “speak with steward Gixx” doesn’t always come up as you approach. Instead you end up going straight up to the two scholars, going through that scene and then the quests doesn’t update, forcing you to restart.
As far as I can see this is just pot luck whether it works, which is a pain.
I know this is an old post but it was an issue for me just now so perhaps this will help someone in future too