I know for a fact now that this happens on 3.3.7.2, but I am pretty sure it also happened before. It's just that you always go "huh, did I just hit 'yes' or 'no', well, nevermind..." when this happens. But when it happened to me recently when we had finished a lengthy 3.3.7.2 game (where I was connected as a client) I, for once, consciously pushed the button to remain in the game, but it did kick me back to the main menu. So right now it is no more this weird feeling of something possibly being wrong there but I know it for a fact.
I guess it can be hard to reproduce, though. And luckily it's not a grave bug.