Huh I've never seen that before
Two Games at Once?

If your partner does not play with you, you should first cancel the partnership with him and then look for another partner
That is, of course, if you don't intend to play with that partner.
If you want to play with that person as a partner, the interface should not set you up with another player as a partner.
I mean, that should be obvious.
So, I joined an Arena. I'd lined up a partner. But because he was finishing a Crazyhouse tourney, he wasn't in the Bug tourney yet.
So, I was hooked up with another player as partner. Soon, my (agreed) partner joined the Arena tourney. Suddenly, I'm in that game! With that partner.
My other game didn't end. It continued!, but I couldn't see the game.
I could hear my partner's tells, which became desperate "please move" requests. But I could do nothing. Eventually, we lost on time.
Very weird! Has anyone else seen this?
I submitted a Bug Report. I suggested: