It was the limited time offer where you needed to have Yggdrasil and the 5 Fae dragons and you are supposed to receive 30 Yggdrasil orbs.
I have all 5 Fae dragons and Yggdrasil, all of them were hatched, yet no reward. I can see this being a bug as 3 of the Fae dragons were 1 star, and two were no stars.
It is an annoyance because I had to use gems to buy orbs for the Evanescent Fae Dragon, use gems again to speed up the summoning, and then use more gems to speed up the hatching just so I could have it within the timeframe of the special event / reward.
I need to raise a ticket to support? Anyone else have this problem?