During a Standard Brawl match today, I used my Disdainful Stroke to Counter the commander, as it prompted me to cast it in response to my opponent casting their commander Aatchik, however after casting the counter did not auto-latch on to the commander spell being cast, and I was prompted with "do you want to target this spell". I said yes, and the end result was the opponent's commander still entered the battlefield, my spell did nothing and went to the graveyard, and they then went on to win the game. There was nothing on the board that would have made Aatchik below mana value 4 in any way, and with it's base mana value being 6 the spell should have went off and countered it. Please look into this, for now I have to remove the spell from my deck for fear that it is bugged and its code is not properly functioning.