X Spline in mocha AE not stand still

Hello everyone, sorry my bad English.

I have issue with X Spline in Mocha AE with drone shot.

I want to draw a boundary line for properties. Everytime when I track X Spline, it is moved from the first point.

Can you please provide a video recording how it’s happening? Also, how does the surface tool looks at that moment, does it jitters?