Today I faced also a bug, When i reached the underworld on aureen, kralkatorrik started to hit with tail. It asked to use (2) to activate the shield, so if i did or not kralkatorrik wont be able to hit so its the same , and it wont end, this is lasting forever. Waited 10 to 12 mins and still stuck on this stage.
I tried to get out and relog also replay the story and still the same issue.