This battle always stuck at turn 10: http://web.pokemon-online.eu/replay/151113-3643446071 Please look into it
I can confirm that one of my online replays is suffering from a similar issue. http://web.pokemon-online.eu/replay/160201-3060382882 At Turn 8, it freezes around the time when the enemy Registeel uses Explosion.
There's a very likely chance one of the players forfeited at this point, as that causes an abrupt finish of replay logs I think.
No, neither I nor my opponent forfeited at that point. I have the log to prove it; would you like me to PM it to you?
You can just look at the console to see if errors print out and take a picture. Both seem to crash from hpchange