I chose quest that gives double battlecry with Rodeo Performer as the minion you’d get with it. I forget exactly what the condition was to complete it, but it was something that completed during the combat phase.
On the combat I complete the quest I also had gobbler on board to the right of a bonehad, intending to triple with a skeleton I had on board from previous gobble.
At the start of my turn the gobble happens I get a golden skeleton in hand, but the promised Rodeo Performer from completing the quest never appears.
My hand was empty so it couldn’t have been lost due to having a full hand.