There is an issue I did notice, I'm not sure if you've come across this yourself, but I did see this in the sample project also.
When two different actors end up in the exact same Y position you'll get flicker between them as they seem to fight for dominance using Z-Order.
Viewing post in Luyren AI and Combat Pack comments
At least on my end, that flicker looks like a pseudo-transparency. I liked this accidental result so I just left it as is.
If you want to remove that effect, I believe you can replace >=with just > in the "UpdatePositions" event, where it checks for "Y Position Check". I'll add that to my to-do list as I update my resource packs, but either way thanks for bringing this to my attention!