Why is it every other Heroic Victory on the AI turn CTDs?

[artaxerxes]

No, not just any heroic victory, but those when attacked by the AI.

Indeed, I find all the post-battle CTDs happen when attacked by the AI, rarely on my own turn.

I haven't noticed heroic victories giving more CTDs than others (though obviously having your heroic victory deleted is more annoying than having your Average Defeat deleted). Also I've never played Romani. But I DO AGREE that battle-related CTDs primarly take place during the AIs turn. I never get CTDs on my own turn, but I'm always in danger of having them when I fight a battle during the AIs turn. And CTDs (non-battle-related) also often happen during AI turns, whereas I've never experienced one DURING my own turn.
Conclusion: for some reason the AI turns are far more prone to CTDs than the player's turn. When I play EB on my mother's computer (which isn't very good), I'm literally holding my breath every AI turn, because I fear a CTD, but I never do that on my own turn - so for some reason, the AI turn is more unstable than the player one.