Bug: SVG export includes grasshopper preview geometry

The SVG export in Rhino 6 is a godsend. But I just now figured out why I keep getting duplicate geometry in my SVGs - the Grasshopper preview is being included in the export! I would expect only selected geometry from Rhino to show up in the file. Exporting to svg with only the rectangle selected in rhino, I get this, including the plane grid and circle from GH preview:

:cricket: :cricket: :cricket: