Battered hilt bug or wat ?

I have a strange "bug" or sth tbh .
I did quests to The Purification of Quel'Delar
When i teleport to Sunwell there are all "bad guys" and im in boss bubble so i cant go to sunwell to finish quest.
Anyone had same problem or im some kind of "special snowflake" and I need to msg a gm to help me?
Anything or any solution to work it out will be appreciated

Did you talk to the guard to get into the instance or did you just walk in?

I talked to guard.

It's not bugged, it works just fine, you just don't know how to do it.