Werewolf play does not count as playing a card?

Just experienced this on Nodes of Power. First turn, I played a card, opponents first turn they played a werewolf. The werewolf immediately transformed when the turn passed back to me for my second turn. Double checked the card description and it said it transforms when there was no play on a turn. But doesn't them playing the card itself count as a play/cast?

I don't know why that happened.