Halo 4 multiplayer bug found

I’m not sure if this will happen everytime. But my son and I were in a party playing MCC halo 4 multiplayer slayer on the Pitfall. Mid match I wanted to see my score so i hit the old select button the one that shows the score with the two squares and the second I did it kicked my party out of the game. We were each on our own xbox one on our own xbox live account connected to my internet.