"[Bug] If you leave a gym battle after knocking out a Pokemon, and immediately rejoin, it swaps to your previous lineup."

#PokemonGO: This morning, when I was doing my gym battles, I came across a gym where two of the defenders had recently golden razzed their Pokemon, but none of the others. They were the first ones in line for battle, so I thought I would try to knock them out one at a time to see if I could get them both out before they had time to defend. I knocked the first one out, but I didn't have anything good in my lineup to battle the second one at full motivation, so I ran from the battle and came back into the gym with a better lineup. I started the battle, and the instant the countdown timer disappeared and the fight started, my Pokemon went away and was replaced with the one that had finished the last battle. What's more, my whole lineup was replaced with the lineup that I had set for the previous battle, as well. Has anyone else seen this? Is this new? via /r/TheSilphRoad http://bit.ly/2FACyqp