I’m using Linux and openGL4, I don’t know if it happens on other OSs.
I created a AnimGraphNode and respective AnimNode, based on the implementation of the Modify Bone. I copied the implementation and tweaked it a bit.
So, as the Modify Bone, my classes inherit from UAnimGraphNode_SkeletalControlBase and FAnimNode_SkeletalControlBase.
The problem is that when in the editor, playing, and when focuses (clicked with the mouse) it crashes the UE4Editor.
I’ve debugged a bit and found that it all comes down to the editor trying to cast my classes into the Modify Bone class (UAnimGraphNode_ModifyBone), which fails, of course.