I was In the TinMage TF, Last Mission to Stop Coles Invasion. I was summoning my pets and only 2 Demonlings and the Ember Demon showed up even though I summoned them all. Not sure if it is a bug, but thought I would let ya know. I did die once in the mission and after being resurrected I was able to summon my demons normally. Not sure what was going on when I entered the mission and started summoning. Figured it is a bug of some sort. I have run into this once or twice before going into missions, thought it was weird. Not sure if this helps, but thought I would say something if it is some sort of bug.