Hi
I'll be testing the editor functionality in the next days to see if I'm able to reproduce the problem you are suggesting. I have a vague idea of what's happening but will need time to see if I'm correct about it.
I've seen the other thread too about dummy poles persisting on the map, which is a very sporadic thing to happen, and I've never been able to reproduce. The best solution overall is to add a functionality to check and "sanitize" the whole map when the user is reverting back to vanilla roboports, but this is going to address the symptom instead of the cause.
Can you please include a list of mods you are using when getting this issue?
Thanks