I had my BB Priest cast Withdraw on herself. It was a thirty-second duration though, so the fight ended before the spell did. First, the spell should end immediately when combat ends. Second, when it did finally end and there were no enemies to fight, I guess the character still wanted to do an attack action, because she attacked herself once or twice.
Has this happened to anyone else, or is this going to be one of those odd rare occurrences? I'll be making a point to try to duplicate this in the next fight.