Getting some ghosting of child sprite when the parent is using Physics behavior.

So I have a main sprite (parent) that uses the physics behavior and the stepping is set to framerate independent. The gravity is set to 15 and it flaps around like a bird. When I add a child sprite to the parent, the child has ghosting (like a small trail) as the parent flaps around. It looks like the child is being set to the parent position too late or before the parent actually moves to it's new position.

I make the 2nd sprite a child of the 1st sprite, using Add Child. And then position the 2nd sprite to an image point on the 1st sprite. That all works fine. But when the 1st sprite moves around with Physics, the 2nd sprite has ghosting/is blurry. I'm guessing this might be a known issue that needs to be fixed. It's not game breaking but is definitely detracting from gameplay. I made sure it's not a collision thing by disabling the collision on the 2nd sprite, and the ghosting behavior is the same.