Not sure what is going on yet. But at least this I can say:
I also have the multi-attack option toggled "on" (which, perhaps, is causing trouble? I don't see why, but I'll mention it just in case).
Should not matter at all. The mod turns multi-attack on regardless of your settings.
function Server_Created (game,settings)
settings.MultiAttack = true;
settings.AllowPercentageAttacks = true;
EDIT: Hmm. If you have a screenshots of the orders where an AI multi-attack that might be helpful. I read through the mod code and didn't spot anything obvious that should make the AI do multi-attacks, thru I do have some suspicions.
EDIT 2 : Ok, I managed to have it occur and completely break stuff. Let me see if I can figure out why :)
Edited 2/2/2020 06:25:27