Yeah, unless I can replicate it I'm going to assume user error. I only pay attention to these things a bit after the fact and then I'm left scratching my head.

I'll circle back if I run into it again.

This much I have noticed so far, the AI can prove really annoying now with ranged units. They fire and run away. And I don't have cav yet so interestingly enough no matter who I chase them with no one can catch them. So they run up, fire, and run way. Rinse repeat. And seemingly have more ammo than me too boot. Total War Run Away.

I'm just happy I haven't run into agent spam, yet.