Add a PrimitiveCreate and AttributeSet node, wired together.
Make sure the view and edit flags are on AttributeSet and expand the scene graph.
Middle-click drag a scene graph location (e.g. /root/world/geo/primitive) to the Add Locations widget in the Parameters tab.
Note that the path is not visible anywhere in the Parameters tab.
Collapse then expand the paths parameter group. Note that path is now displayed.
Steps to reproduce (case 2):
Drag the location into the empty text field under the paths (1) text, rather than the Add Locations widget.
Steps to reproduce (case 3):
The same issue also occurs when choosing Replace with Scene Graph Selection from the Add Locations menu, rather than using drag-and-drop.