Just so folks are aware, mind you the bug dose need to be fixed, but myself and 2 friends found a way to work around it. The cages FAR away from Kar’aaz are not bugged, but as soon as you pass the large fel pool they become bugged. HOWEVER… after we killed Kar’aaz for our friend, they were able to open cages with no bugged teleport.
I don’t know if this would work for everyone but it’s worth testing, so perhaps get a friend to help you out for now if need be.