Windows in compound wall

Good morning,

I have a quick question. I have created a compound wall, the one on the far right. Nothing special, internal finish-external wall-grc panel.

We have 20mm gap between the external grc panels. In the model, the windows penetrate the wall however when we export to IFC, some of the windows are not there.

I have attached images of how it looks. Any suggestions? And no, the windows are not the wrong way :)

Image1: AECOsim

Image2:BIM Vision export (front view)

Image3: Bim Vision export ( inside view)

Image4: Compound wall settings