Had Scute Swarm out and made the max amount of tokens. Went to swing out with everything and then my opponent cast Flare of Fortitude in response. Flare of Fortitude resolves, and we proceed to the damage step. Every once in a while, a creature would do an attack animation, but for the most part, nothing was happening. The Flare of Fortitude reminder on the left with a read flashing aura around it was always up, like it was constantly triggering. Eventually, the game used my timeouts, and then I lost because the game state was basically "frozen" (although the actual game was NOT frozen) and I could not perform an action. To me, with how long the card has been out on Arena, it is unacceptable that a bug like this is still a thing.