Arena 5 team fought in Arena 6 and got Arena 5 chest

Even though I’m in arena 5, I ended up fighting opponents in arena 6 a few times. I actually won one of those matches, but instead of getting a higher level chest worthy of the arena and opponent I fought, I got a chest from arena 5.

You get the chest of the arena you are in, not the arena from your opponent

Under no circumstances should you ever be matched up with someone not in your arena. I mean, even if someone somehow thinks that’s fair (which it isn’t), it’s not even physically possible. I’m standing in this arena over here, and you’re in a different arena over there, so how are we fighting?