I was fighting bug momma with a friend, then our game crash during the fight.
We relaunch the game and the fight isn't start, but there's already one of the egg was already destroyed, so we couldn't end the fight it was stuck in the last phase waiting for us to break an egg that didn't exist anymore.
I then tried to restart my game, which just make it worse since now two eggs were destroyed so we got lock at the first phase.