active rigid body changes its starting position when i start animation

please help
i have an object following a path
i gave that object active rigid body & also collision
and now when i start the simulation (animation) , it suddenly re-position the start point to a place far away and start following the curve but away from the original position

stc=1 after >>>> stc=1
blend file attached >>

Attachments

push wall2.blend (4.64 MB)

Without looking at your file (no time just now) my first thought is “Do you have the origin of the object and the origin of the curve in the same place” If not, you will certainly get the type of behaviour you have described.

Cheers, Clock.