Originally Posted by sapphire_neo
One of the UI changes in the update is that the Nook Hound no longer reveals the card to an opponent. To everyone other than the owner of the card it's shown face down. However, you can just double tap the card to see what it is or you can just pay attention as it goes back to the owner's deck, when it is no longer face down but face up. Hopefully this is something they fix with the PRIME update.
The double tap issue has already been fixed internally and will be included in the next update. If the card is shown face up when animating back to their hand, that's because they chose to discard it. Since you can just look in their discard pile to see which card it is, it's no longer necessary to continue hiding the card.