I was under Ring protection in a Timeless Eldrazi mirror. My opponent's Echoes of Eternity and Glaring Fleshraker triggers created a stack that Arena could not resolve, but they played in a way that suggested they did not have Kozilek's Command and I would certainly have won had the game gone to my turn. I did not have priority with which to time out, and Arena gave the warning that the game would end in a draw if no new action was taken, but I was given the loss. I understand that this is an unusual game state that stress tests Arena's engine, but it was a game that I was 100% to win, and I should not have gotten a loss.