This is incredibly frustrating. From time to time I am able to drag the spells and target minions but when I release my finger it does not register. The only way around this is to restart my game and I lose out on a whole turn which often results me losing in the game. I just had this bug again for the fifth time this week and this time it was incredibly frustrating as I went back onto the game and managed to drag the spell but did not have enough time to use my minion to trade off his which gave him lethal. I lost a great arena run because of this bug and I want my money back.