Kerbal Space Program

I think this has been an issue for some time, but it's rather buggy if you ask me. The Go-to node creates this green NAV marker on the map view and you can right-click on it and activate it as your next marker. This is the case in the Core game when you get multiple sites to run surveys in a general area. The marker is removed from the map when you reach it, leaving you no way to deactivate it and remove it from your NAV ball. If you don't go to the marker, then it is on the map and you can deactivate it.

So simply put, make the Nav Marker inactive once it is removed from the map so it doesn't appear in the NAV ball anymore.