Bug with "The Battle For The Undercity" quest

So yesterday I started "The Battle For The Undercity" in which I'm supposed to talk with Thrall outside of Undercity, but when I do nothing happens and I can't advance any further. I also can't go back to the normal Orgrimmar nor Undercity because it stays the same as if I were doing the mission still (like in a different type of layer in which there are no players or npcs). I already opened an ingame ticket (btw no response yet) but I was wondering if the same problem has happened to anyone else recenty.

It's a common problem and you did all you could. Make sure to ask the GMs to move you to normal phase.

All I can do now is wait then, thanks for the response.