Not sure if we are consideringt his a bug or not, thusly the ? in my [bug]. Anyways noticed that if you wipe out an AI while you have a mission against them that you will autofail it.This is what happend.

I wiped out a Vasari AI, but didn't have enough ships to kill for the Mission to complete. Also it was past the timer to reject the mission. So I just had to let the misson auto fail causing the 4.5 relations swing for the failed misson. I am assuming this is a bug, but perhaps not.

Regardless, it is a minor concern if you actually were tryingto use some diplomacy since obviously its not much fun to have a misson and not be able to complete it at all since the Target of the mission no longer exists. Anyways just my 2 credits on the subject.