Is this the so-called 'reinforcement bug?'

[Teleklos Archelaou]

Or the one way that works for now in those situations: the dreaded auto-resolve

[aln]

I've just fought a battle against the Aedui as the Romani. I was besieging a their town in northern Italia, can't remember its name. It was a reinforcement battle with 3 generals in total, 2 Aedui and 1 Romani. One general sallied from the town the other attacked from outside. I got a clear victory with minimal casualties . No CTD at the end of the battle. Does this CTD problem only occur with heroic results?.
Sorry do not have a save game.