What did you do? - placed a smelter blueprint on top of the already existing coal belt and then placed the underground going up.
What happened? - the coal belt going north did not get "picked up" by the underground.
What did you expect to happen instead? It might be obvious to you, but do it anyway! - i expected the ug to "pick up" the leftover belts
Does it happen always, once, or sometimes? - it happens always as far as i can tell. i tested it in multiple directions and placing orders, be it first the ghosted belt and then the belt dragged to then place the ug.
