Jace, The Mind Sculptor +2 Ability doesn't work
In three consecutive matches, I played a Jace, The Mind Sculptor, and attempted to activate the planeswalkers +2 ability. In the past, when I've done this, MTGO shows me the card and asks whether I would like to leave it on top or put it on the bottom.
This time, the client said "Look At The Card" and then asked "Would you like to activate JTMS's ability?" When I clicked yes, the ability resolved. In addition, one time my opponent activated this ability, and I was unable to see in the game record whether they had returned the card to the top or the bottom.
There are recordings of each of these three matches.