Everytime I've played this mission, the titan after the seals just stands there, doing nothing. A group of armors on the roundabout way to the 2nd double boss-fight does the same.
This is obviously a bug and should be fixed.
Abaddon's mouth bug
Nighteye
Savio
It's been like that since...forever, as far as I can tell. Send it in at http://support.guildwars.com and maybe they'll fix it finally. Closed.