Apparently the new Wintersday patch introduced a new bug to Citadel of Flame.
Upon defeating the 3 godforged creatures (I forget their name, they’re right after the devourer nest part), there is a chain you pull to open the gate to the prison warden. This chain will not give you the option to pull, thus not opening the gate and ending the dungeon right there and then.
I encouraged my group to report as a bug, but I thought I’d give you guys a heads up if you’re planning on doing path 2.