Some IfcRelSpaceboundaries not transferred from Revit to BlenderBIM

MaxMax
in General

I have exported the demo model from Revit to BlenderBIM with 2nd level space boundaries (https://github.com/maxtillberg/ICEBridge/blob/main/RAC_basic_sample_project_spaces.ifc) but there are 3 problems when I import the IFC into BlenderBIM and I wonder how I can determine if the problem is in the Revit export or in the import into Blender? The problems are:
1. No IfcRelSpaceboundaries for the curtain panels
2. The big space bounding column has no IfcRelSpaceboundaries (marked in red)
3. The geometrical presentation for two of the walls overlaps partly with the windows (selected wall in the image).

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