[GAMEPLAY] Game froze causing a overtime loss to happen

I was 1 of three last alive with my 6 assassination comp, fighting another player. I had two units fully healed and the player had one very weak one. But, the game froze right before the attack for 10 seconds, causing it to go over time and the remaining 2 health I had was killed off. We were still able to walk around the arena with our avatars. This is the first time it has happened to me but, I have not played that often.