[Quitti]

Seen it a few times - no uber-critical moments ruined by it though.

If it would, I'd be annoyed, true, but it's still a game. And the bug is not the most common thing happening - you probably get ruined more times by a unlucky event in the start of the game/critical moment (plague in capitol, high unrest event in start/war or stupidly unlucky rolls in combat vs your SC pretender or something in these lines) more than by the bug in question. And MP games aren't really a scarce commodity at the moment. If none are being set up, nothing prevents you from doing so.