I was magnetizing my minion but my magnetic mech just played directly onto the board instead of magnetizing. It has happened to me twice and both times it was caused by my teammate passing me a card at the same time. I believe the pass cancelled and overrode the magnetize function, and so the game just defaulted to dropping it on the board instead. The first time may have been Lullabot to the Deflect-o-Bot, but the second time was definitely Accord-o-Tron to Deflect-o-Bot. I have no idea what cards were being passed, nor if it was a manual card pass or triggered card pass from other card.