We discover with a friend that if you have a problem to enter a game (wrong name, full etc…) you are then directly in the “An error occured while communicating with the servers” wagon.
The lobby pops this error as soon as something goes wrong, and then, you need to exit the lobby, it’s dead for you or any game you try to create or join will fail.
Did you have this feeling too? Maybe an easy bug to reproduce, since the game was clearly not validated.