Day's Undoing bugged. [Fix in 4.7]

Day's Undoing is misbehaving. People have mentioned to me that it's not working properly since the update. Just now, in TOTP, it asked me if I wanted to cast it, I said no, and it seemed to cast anyway. I'm not sure that this behaviour is consistent yet though?
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Thank you for the feedback, this issue will be investigated!
In order to help us, please provide the following information (you can PM me the answer if you prefer, or send it to Customer Support in-game):
Is it related to trigger, mechanic, text, or other?
Which Event/Battle?
BattleLog screenshot;
All cards in the deck and possible interactions that might have happened.
Thank you,
Marcela.