Going AFK in Co-op Battle

Is this a new thing? I saw it so many times the last games. People just say: “You dont deserver to win…” and go straight up afk…is there no penalty?

bro i’ve seen that happen both on my team and on the ennemy team, people really think they’re god or some sheeeeet

Report them for obstruction in game to those horrendous fat men without a dad