I don't know if this is the correct way of communicating these types of issues, but here I go :)
I started experimenting on BlenderBIM with my actuall project. In fact I was looking for a mistake in the IFC Structure to solve a problem of component relation. When the IFC is opened in BlenderBIM it shows strange opening elements that are to be found only in BlenderBIM. I also use the GeoemtryGym, but they are not listed there.
Otherwise the representation of the model is great.