Why are the parts of my model detaching when spinning?

The script I use to make the model turn around slowly detaches the parts. They are anchored and perfectly aligned with each other. workspace.earth.PrimaryPart = script.Parent.yeet while true do script.Parent:SetPrimaryPartCFrame(script.Parent.yeet.CFrame * CFrame.fromEulerAnglesXYZ(-.0025,.0025,.0025)) wait() end

picture: https://gyazo.com/05ada0b0234c7e70dabb43b4822e6fa3