Ore sorting plant: copying messes up the output port map configuration

That it, copy-paste an ore sorting plant with custom output port map and get a mess in the resulted copy's output port map.
Screenshot of original vs copy.

🤔, this looks like the copy-ing process is first configuring the sortable resouces list, (updating which is populating the output flters) & then applies all of the output filters (without clearing the ones that got automatically populated).
Maybe it performs both actions at once & you end up with this.

What happens if you use the v key to transfer the settings from the old plant to the new one?