Hi, I did find a pretty dumb work around to this in 4.16.
My Character would call the function in the custom component, The custom component would do all the calculations, and then the character would copy all of the variables that mattered onto itself.
Then I simply pointed the animation blueprint at the character, instead of at the custom component that was on the character.
I don’t know if this issue still occurs in later versions after 4.16.