Multiple controllers on one spline breaks stuff

[_Aka_]

You are welcome. Now you have to put my name in the credits, and give me 12.5% of the revenue of your project :p
Seriously though, and to give you my train of thought:

• First I opened the scene and saw the issue
  
• I removed all the unnecessary objects, in hope that this will fix the issue. If it had, I could restore the objects one by one and find the culprit.
  
• It didn't work, because even with the least amount of objects the issue was still there
  
• I checked the objects in hope to find a script or something that will make the object move differently than what the Spline Controllers do. I found nothing
  
• I tried to see if there is any difference between an object with the issue and one with none
  
• I noticed that in playmode the name of the mesh becomes the weird thing I told you about
  
• I tried to find if there is any script that modifies the mesh, maybe it was modifying it and translating the vertices at the same time. Found no such script
  
• Opened both meshs in hope to find a lead of any sort, found noting.
  
• tried replacing the mesh in the problematic object with the one from the working object, and it worked
  

So until now I don't know what is the origin of the issue. But I am happy with not knowing