Xref resets path constrain "% along track" upon reopening?

[oyvind3BPMJ]

I want to have an xref multiple times in my scene, where I move the green point to a new place for on each reference in the scene. The problem is that the green point, upon reopening the scene, will always return to the xref file's original position.

 

I can animate the line itself, it'll stay in position. But the path constraiend point helper? NEver stays where I left it

I've tried multiple xref presets. Same result.

All I wanted was to reference my rig multiple times into a scene, position it, and then animate it. It works in Maya... why not in 3ds max?