Spline Mesh Generator problems

Hello Community !

Currently working on a Spline Based Mesh Generator Blueprint, I am having some troubles.
The objective was to create alternately Gold mesh and Stone mesh along a spline, with 3 differents pattern for each type of brick generated randomly.
Meshes are generated between two point of the spline
(I am using the 4.19.2 version)

244480-objectif.jpg

The switch between gold and stone is working well as the random generation of each type but :

The problem is that some meshes are not generated or generated at the wrong place : they seems to pop at the end of the spline.
I tried to circle the problem putting some colorfull material : here is the result

5 Meshes are missing and they seem to be stack at the end of the spline on the last interval.

Moreover, if I change my randomize to generate only 4 différents type of brick, it appears that 3 meshes are missing still stacked between the last 2 points (last emplacement)

If I moove points on the spline, the random generation work well and change bricks but also, the missing meshes change location :

244496-problem-gif.gif

Here is the “TopPart” of my blueprint

and the bottom part (nodes are almost the same after the FlipFLop : 1 branch for gold and 1 for stone)

Here is a link to a googledrive with an archive of my project :
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Any ideas on what could be going wrong?

Thanks for your time !!!