Unsure if this is something that would work, but there seems to be an issue with Picker Dollies [https://mods.factorio.com/mod/PickerDollies].
In short, when I "slide" or move the placed robosubstation entity, the spinner/antenna from the roboport, and the logistic zone both are duplicated. The substation component moves correctly however. I know this is achieved with a complex object, so uncertain if this would be do-able. Maybe just throw an error, or somehow inform the Picker API that this is an "unmoveable" entity, etc. Because as of now, I can't find a way to actually remove these duplicated bits from the robosubstation.
Pictures show this easier than I've likely been able to describe it:
https://mega.nz/file/pFxGCYYY#ES8aK9Gp4zIc1eZ3KBxD__V7uJKBMujpE1QnQE1PgoY
https://mega.nz/file/IMxGwKIT#jVunP8M6m0D11ZXo5ohtahFU107cn5RdfZk22z0yihw
In this pictures, you can see I've attempted to move the robosubstation down two tiles, and up one tile from the original position. Hence, three duplicated spinners, and three duplicated logistic zone/connection.
Thanks for this mod!