Geometry generated in Revit with GH lingers between Revit sessions

I seem to be unable to remove the geometry generated by GH/Rhino (inside Revit) even if Rhino/GH session is turned off. Even worse, this geometry seems to linger between Revit sessions and different files (??).
Thank you!

The geometry generated by Rhino.Inside.Revit is pinned. If you unpin you can delete.

If you have a Rhino.Inside.Revit grasshopper definition open and open a new project, the Gh will preview and run if refreshed in the new project. Create a new GH definition with nothing in it before switching projects, or lock the solver.

Does that explain what you are seeing??