Export/dump gbXML - missing windows

Hey guys,
I am trying to dump a gbxml file with the honeybee grasshopper function, it exports smoothly, however, the windows are always missing. Instead there are just holes in the walls. Does anyone know why this could be the case? I use the basic SingleFamilyHome Example file and just add the dump gbxml box to export it.

The issue is visible when I export the gbXML and open it in the online gbxml viewer.

Would be very thankful for your help!