What about the cloak of fear?

Maybe that lists as dodge if they fail the check. I don't know exactly how it works, but if it's attacker's spell mastery vs her spell resistance it'd be nigh impossible to hit her with such a high spell resist.

I just now read the description of the Cloak of Fear. I guess that because the "Dodge" text appears when my units fail to hit her, I thought it must be her dodge value that affects this. I was wrong.

My mistake. Cool enchantment then...

EDIT: Indeed my hero, which has a higher Spell Mastery is able to hit her from time to time. So it certainly isn't a bug. Sorry, I should have read more carefully. Though it shows that auto-resolve doesn't take into account such enchantments. But I guess it would be way too complicated to do so.

I think you were right. It shows "Afraid" on top of the units that fail to hit her, so it must be that enchantment that's causing this. Quite powerful enchantment...