Bugged Ascendence

In the second act, I think I might have killed the boss in the traitor passage before I got the quest. This is the second time through act 2 (lvl 50ish). Quest says search traitors passage, but i have several times and killed the boss there several times and the quest doesn't progress, how do I fix this?

I'm having the same issue.

Any updates would be great. Thanks.