Dunno if this is a persistent bug since in the past ive had it happen but not for awhile afterwards however this time the dungeon bugged twice in a row.
I ran path 2 and near the end at the part where you have to protect the charr from the ghosts the event wouldnt activate. The first ghost that pops up and talks to charr did not show and the charr just followed us around.
Then hours later (just now) i ran path 1 and at the very end after we killed the final boss no cutscene played and we did not completion.