Spring controller getting double transformation

Have this little alien guy flying a spaceship and want to get their antenna bouncing procedurally. Couldn’t get the Anim Dynamics node to work well, but I had some luck with Spring Controller node. However, I’m getting a kind of double transform.

Alien is of course in the spaceship. When the spaceship moves, the joint assigned to the spring controller leads. I would think it would at least drag behind but it translates forward before the alien does. What I was hoping for was more of a local instead of a global effect. I just want the jiggle to happen as the character moves about in the ship, not when the ship itself moves. The adding of the node automatically creates a local to component node, is there a way to get it back to calculated in local space?