I already did try making a new child BP, same thing.
The children BP are using the same animset, same thing, mostly what changes are the variables of defence, health, weapons equipped, the 3d model, etc.
Are you telling me that the anims are not compatible from older engine versions? because if I use the parent BP, everything works perfectly, even with different models using the same skeleton. the anim notifies are being triggered aswell. but if I use the child blueprint nothing works. so I dont think that might be the problem. I might be wrong though…