Happened to me as well. Occured when opponent was trying to figure out how the Enlist mechanic works (they were trying to tap the enlisted creature during attack declaration, not during the attack itself). The attacking creature was put in an infinite loop like it was being tapped and untapped fast. Video attached of behavior. I let the game hang in the infinite loop for 10+ minutes and was awarded Victory -- unsure if opponent simply conceded first or the loop resolved and player was timed out for inactivity.
Happened to me as well. Occured when opponent was trying to figure out how the Enlist mechanic works (they were trying to tap the enlisted creature during attack declaration, not during the attack itself). The attacking creature was put in an infinite loop like it was being tapped and untapped fast. Video attached of behavior. I let the game hang in the infinite loop for 10+ minutes and was awarded Victory -- unsure if opponent simply conceded first or the loop resolved and player was timed out for inactivity.