Today when playing Arena i played Murmuring Elemental(your next battlecry this turn triggers twice) and Bunker Seargant(if your opponent has 2 or more minions deal 1 damage to enemy minions) thinking Seargant’s battlecry would trigger twice.
After the first battlecry there were still 3 minions on opponent’s side, but Seargant’s battlecry didn’t trigger second time. It very likely cost me the game.
I can provide screenshots if neccessary, but I don’t know how to post them here