In a draft I was indecisive in picking a card. As time ran out I attempted to drag a card into my deck. The originally selected card was placed and maybe the other card, I don't remember what I was picking between. Afterwards I was unable to see any of the cards in the other packs. Closing and reopening the game allowed me to see the cards, however there was a Moon-Circuit Hacker in my deck that I definitely didn't pick myself.