IFC layer name for multiple slabs with openings

[ola.opkvitne]

I posted a topic regarding issues with the IFC layer output in Solibri Model Viewer for slabs with opening, after exported from Revit 2018:

https://forums.autodesk.com/t5/revit-structure-forum/ifc-layer-name-for-slabs-including-openings-cha...

It turned out that a path in Revit.ini-file, under [Directories], has to be added like this:
ExportLayersNameDGN=C:\ProgramData\Autodesk\RVT 2017\exportlayers-dwg-AIA.txt

This way you can override the IFC layer output in SMW (Solibri) to show an personal ideal layer rather than the default "A-FLOR-___-OTLN". If I leave the field blank or type "250_Dekker", the elements in Solibri says "No layer" or all the slabs get the layer "250_Dekker".

The problem now is that I got multiple slabs that need it's own output layer value depending on the slabs structural behaviour per instance, like this:

Slabs (Modelled as floors) on the lowest floor, layer: 252_Gulv på grunn

Slabs on all else floors with layer output: 254_Frittspente dekker

The layer output for columns, beams and bracings are controlled by the Revit parameter IfcPresentationLayer regardless if the exportlayers-dwg-AIA.txt contains a empty field after the associated line or the line the structural component belongs to, like this:

Layer output for Columns: 222_Søyler

Layer output for Beams or Bracings: 223_Bjelker

And, they outputs in Solibri are dependent on the IfcPresentationLayer from Revit. So why isn't this applicable for slabs with openings? The other slabs (or floors) that doesn't contain openings get the output right.

[ola.opkvitne]

I just found out that if I select the Modify Sub Elements button in Revit for the slabs including openings without actually modifing the nodes or the sub elements, the layer output in SMW finally shows the value from the IfcPresentationLayer parameter! I also noticed the geometry output in SMW changes from Extrusion to Solid after enabling Modify Sub Elements.

Another floor with the same issue does not show the layer output unless I change one of the subelement nodes to -1. The geometry output does also change again. Is the geometry output somehow connected to the layer output? If so, is it possible to control this in a manageable way?