Mechagnome quest line: misplaced text and cannot finish the final step


In the final quest, Ascension, chat between Prince and High Tinker seems to be misplaced

Prince Erazmin says: I can hardly believe my eyes… the fabled city of Mechagon! Most impressive, Prince Erazmin!
Gelbin Mekkatorque says: Thank you. Sadly, for too long this city has symbolized the schism my father created between my people and the rest of gnomanity.

And what’s more, the (final?) step of this quest, “Announcement heard”, is not flagged finished when i walk into where King Mechagon is slain. The screen dimed (seems like a missing cinematic), and nothing happened.
I tried logging out and in, teleporting to Emerald Dreamway and back, but neither help.