SceneKit Editor modifying duplicated element changes original element
By Apple documents
However, it also means that changes to the objects attached to one node will affect other nodes that share the same attachments.
https://developer.apple.com/documentation/scenekit/scnnode/1408046-clone
When yor copiying node in editor it actually makes a clone node.I am not aware about the default values of geometries, but if the geometry specified as shared then all the similar clones will get changed when you are changing one of them.
In your case you just have to click the Unshare button to let the clones to use a distinct copy of the geometry.Which will not be affected by another node changes.
