I am refreshing an old thread issue as I am experiencing this issue, and it has been mark resolved.
His problem description is good, I will not add more redundant reading here. But, here is what I try so far :
After test and logs, I concluded that The anim bp is done before the Update Tick, that what is causing the issue
=> call anim bp update from the bp
Impossiblez to call the Anim Graph from Actor BP
=> reverse logic : attach the bones to the motion controller
Impossible to attach bones to motion socket (we cant only do the reverse)
=> Change the Anim BP tick group
Is this even possible ?
The Motion controller use
BeginRenderViewFamily: Called on game thread when view family is about to be rendered.
PreRenderViewFamily_RenderThread : Called on render thread at the start of rendering.
I made an Event callback to Blueprint from PreRenderViewFamily_RenderThread function.
It is working, callback are made, buuut it make the editor crash after several minutes, issue between the render and the game thread I think.
It also instantly crash if I change scale of an object, but not position or rotation.