I think it's safe to say most if not every player has now experienced this where a Allie will leave because of their own reasons, then 10 mins later boom. Simply put uber pls this needs to be patched.
Well, no. It's no fun playing against an army that just sits there and does nothing. So if all of the players have left, only then should the commanders self-destruct. Obviously not when only one of the players have left. That's definitely a bug.