I personly don't know but is only seems to occur when you only have a brain and shinobi, people have suggested that it's to do with where the particle is created, possibly the script picking the wrong person. DummyTwins is an example, I went into the base, sheilded and stabbed, although the sheilding itself causes problems, like weapons passing through the enemy, this goes away when de-sheilding and happens very occasionaly, often in multiplayer. Although that must still be under work, I think you mentioned it was temporary untill you could make invincibility. Some people posted in the original forum about that.
On topic though - how do you think the "Customisable AI" would work? Would there be an AI selection menu inside the pie menu? (As in you select AI, another pie comes up with all AI modes and you pick one)

or you could just, have a pop out square menu.
Though i guess the other pie menu matches game much more.

I'm quite sure they meant editable in mods. Not via pie menu.

I like the Pie Menu idea, with different selections. Maybe you could also have some kind of modular AI, in which you can build up your own customised orders.

ITT people trying to turn CC into an RTS

bros it is an action game
data's laid this out more than once
RTS elements, sure, but more focus on action that managing units

AI controls will almost guaranteed be up to four states on each actor, customizable on a per-actor basis by modders, taking the place of the current four AI slots

Grifs coding there is what he used in my guardtower, so that any snipers I post up in the top of it stay stuck in place when I'm not controlling them and don't hurl themselves out when I'm not attending them. He made it only local to the sniper box though, so that they weren't getting stuck in air or anything.