I am not completely sure how, but I was holding down on cards to read them during a phase change, and my own timer started counting down. Annoyingly, though, I was unable to trigger any effects or pass/resolve. I was just stuck sitting there with my counter counting down when I should have been able to resolve an opponent’s effects or resolve the phase. 
 Because of this, I received a loss in the event when it was still a close match.

Platform: IOS