I've done 2 battles with Hirrud after the patch and if you fight him it seems like the only way to get him to flee is with resolve dmg. He goes down to 1 health and doesn't run away, just keeps fighting.
In previous versions, he'd use a smoke bomb to get away when his health got low enough. He could still be defeated by resolve, and the post-battle text implies he used the smoke bomb even though he didn't. I'm guessing the latter is still the case?