There was a bug in the LBT 1.3 stable release related to the use of Window Construction Shade to model switchable window constructions (that use glazing materials for shades). The bug has been fixed in the development version of the plugin as noted here:
So you can get the fix on your end by running the LB Versioner, restarting Rhino/Grasshopper, and then running the LB Sync Grasshopper File to sync your Grasshopper file with your installed version.