hand object tracking does not match expectations when the hand is pointed at the camera

Why when the hand is pointed at the camera, the hand object tracking does not match expectations when the hand is pointed at the camera?

Expected :

Reality (using my visual script) :

I use project with assets from https://github.com/p-sun/LensStudioWorkshop/tree/master/HandWaterParticles. How to change my visual script to match expectations?