Is this known? If so, how can I avoid this again?

RunsWithOtter

I somehow got into a game, but the game never went passed the player found screen. The duel seemed to be going on as normal for the other player though. You can see turns changing and my turn end timer running in the photos. I had to Alt-F4 and lost the duel because of this. Is there anyway I can avoid this if this is known, or is this exploitable by players in some way like how Spiritomb wasn't functioning correctly not that long ago?