its gotta be a bug… i just tried the exact same setup on 4.8 and it works right away. But i cant believe no one has come across this in 4.11, its a big deal if its a bug… so i donno.
Yes I tried both custom aicontroller that runs the BT and BB. I also tried standard AI controller. I tried spawning the AIclass with the BT set from the levelBP and I tried manually placing the actor in.
