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

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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?