Hello,
Today I played a Battlegrounds due game in which I had a tripled Blue Crooner with +39/+39 on it. I held the spellcraft card it produced with the mouse to play it on my tripled Zesty Shaker and the card vanished from under my mouse cursor as it crossed the line between the hand and the board.
I’m quite annoyed with this bug or whatever it was. I lost out on placing these stats on the Zesty shaker, the card doubling and giving me another two copies to play 1 on my Lava Lurker, which would have kept these added stats until the end of the game and 1 on my Corrupted Myrmidon, which would have turned it into +98/+98 when it doubled its stats.
The spellcraft card did not reappear in my hand as if never played, it didn’t play and place these stats on a different minion (or the minion I was aiming to place it on), it didn’t get passed on to my duo partner (which I know for a fact because we play while sitting next to each other, it was not a random stranger).