Today I went through a weird bug on the Dragon Rescue event:

As shown in the picture(check the link above this), my archangel dragon got defeated but for some reason he didn't disappeared(You can see the red X on him)

Other stuff that the picture doesn't show:
-The idle animation of the dragon was still going, even though he's not really there
-The enemies didn't attack him (and he didn't attack them)

(The bug didn't affect my gameplay, there was nothing abnormal after the battle)
Did anyone else witness this bug?

Edit: per forum rules, live link removed. Please upload pics using either the chain link or cloud icons anove.

@nynaevelan thank you

I've managed to get the 2 dragons I need to complete the quest, but after they got hatched, I didn't got any reward, when the event ended I still didn't got the reward