"Copies" property of Repeater does not bring desired result

Hello, I'm trying to create a fake 3d extrusion effect using the "copies" property of the Repeater parameter on a shape layer by following this tutorial: https://www.youtube.com/watch?v=OQ1p1NBstVQ

The problem is when I animate the position of the layer, the movement is not smooth as the tutorial shows, it is "wiggle", I believe this must be how copies behaves, generating copy by copy in a non-linear way. Do you have any ideas on how to get around this problem?

Note: I used the expression "math.round (value)" in the copies parameter to avoid the Fade-in effect in the animation interpolation. (Can be better described in this community help thread https://community.adobe.com/t5/after-effects-discussions/make-copies-of-repeater-appear-instantly/td-p/13785688)