Exactly that's what I meant, it sucks greatly.
Unless you get lucky like my last instance group I was running with a view friends - we wiped on her because of some random thing I already forgot, the point is, the boss didn't despawn at all and we just walked into the instance again, rebuffed and engaged her again and killed her, too. I kinda hoped this would be the same case again today morning but .. hell, it wasnt the case and I lost all interest in beating all the mobs for 20 minutes again just for 3 shards and one emblem.