Are these all from a MeshPart model created in a 3D program like Blender?
There are other posts about issues with resizing an entire Mesh model imported this way.
Parts shaped as “Ball” shouldn’t deform like this, that’s why I asked.
You said sphere which made me wonder if you have a “Block” Part with a “SphereMesh” in it to make the sphere. If that’s the case I was wondering what the Scale of the SphereMesh changed to as well as the size of the Part when you tested it.