Won a game on pens then couldn't return to main hub.

I won a champs game on penalties but then after i saved the final penalty i was stuck in game. I could still access the social tab but that was it i waited 10 minutes and found a guide that said it was just on my screen then i restarted the game and was met with a loss and a disconnection warning. This must be some bug that the other player was abusing hoping i would leave and gove him the win a have added some screenshots to prove i won fair and square and I have saved the ending as a video too. 

Would like some help as this bug is really heart breaking after sweating hard to get the win.