Nostalrius Begins - Quality wow vanilla realm (1.12)

i completed blood furnace a couple days ago but now i have people telling me that the door to the last boss wont open. Is anyone else having this issue ?

That is correct - after the four ogre rooms have been cleared the event does not continue (door opening).
PS. You are able to pet pull the boss, but not continue the dungeon.
This does not seem to have been reported on bugtracker tho.

Actually some alliance reported it friday:
https://report.nostalrius.org/plugins/tracker/?aid=4296

odd that one minute it was working then the next it stopped working.