So basically title explains my situation, after leaving and returning instance 4/5 bosses slain, door leading to depths of the vault towards cordana is perma locked, and no way to finish the instance. Just sad that I have to wait for weekly reset to fix this because I’m doing the questline; “Balance of Power” where i would need to farm a lot of items in various raids and dungeons and i cant continue the questline if i cant finish this quest. I could have done so much this week in regards to the questline before the reset but nah stupid door bug costed me a lot of time.
PS. I’ve resetted all instances in the char panel but nothing is happening.
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Sorry to bump an old post but i am experiencing the exact same issue, i’m 2/5 bosses done on mythic for the balance of power questline, had to log out yesterday halfway through, now when i enter the instance i’m stuck on the same floor as boss Tirathon Saltheril, all doors locked no way to reset or open them.
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Bump! I’m having the same issue. I can’t get the door open
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Me too. Had to leave, re-entered and door is locked.
1 Like
Same here… is there no solution?
You have to kill even the vengeful spirits for it to open. And in order to do that you need to pick up the ball of light.
you need to craft or buy Skaggldrynk and use it infront of the door, the quest tells you 
Unless you leave and come back, then it cannot be unlocked again…
which is what the issue is/was. Not opening the door.