My admittedly completely subjective experience with no science to back it up was that enemies were even worse in patch 9 at triggering combat if they were attacked from outside the normal combat zone, even if my party weren’t in stealth.

I agree enemies should seek out the source of attacks though and/or combat mode should be triggered when you attack an enemy even if they don’t spot you.

"You may call it 'nonsense' if you like, but I've heard nonsense, compared with which that would be as sensible as a dictionary!"