I could put a long explanation here, but the long and short of it is that connecting a mover to a mover and attempting to start it does this:
https://i.imgur.com/yE0QvME.mp4
I didn’t think to try it with a path mover as the parent, but at least with a simple mover both of the objects just keep going forever. This doesn’t happen if the distance is set to 0. The direction you set them to move doesn’t seem to affect where the glitch takes them, though the direction itself does seem to vary (Maybe it’s based on the mover’s rotation?) Pressing “stop” in the IO menu makes them just pause, not reset position. Also take note of how they speed up and slow down and then stop before starting up again.
This is a very odd one.