Meshpart not showing correctly after getting cloned()

Hello I’m Ryxku and I would like to report a very annoying bug.
Today I built a racing circuit with meshparts and parts. Everything looks good. Everything is anchored.
But I noticed imperfections when I started racing. My meshparts weren’t displayed correctly.
So I took a screenshot to compare the Meshpart’s Transform in game after a Clone() and on Studio without using Clone().
The code I use to clone my map :
image

My meshpart in game :
image

My meshpart in studio :
image

The orientation is not my main problem, but for unknown reason the meshpart is not correctly displayed.

Duplicate of Many parts refuse to maintain their studio-set orientation in-experience

Sorry for the duplicate version! I should check the posts of other people too! But this is terrible this bug is present since 20 days!