Currently in Revit 2018 if I load a CAD Link without defined geographic coordinates system (only numeric values), I can assign and edit Named Positions to Links as Revit was doing in previos versions; but as soon as I acquire shared position from a dwg with defined coordinates I cant modify or add named positions... the buttons get grayed and unavailable.
This is extremely undesired when working with residential complexes projects.
Here is an example of the issue: