DK quest bug?

I dunno if there is a topic about this already(I think I remember seeing something about it but meh), but I recently made a deathknight and have a serious question.

The quest chain involving The Ebon Watcher seems to be bugged. I turned in the quest that requires you to fly around picking up the NPCs and hes supposed to say something and then another set of quests pop up. I did this on my mage just fine, but when my DK finished the quest, he just took it, said nothing, and then nothing popped up.

Is this a known bug? Or did I get unlucky? Do I get a GM to fix it? Any help would be nice.

Edit: This is for Lord realm btw ;)

Nice support.