IFC exporting questions

I am trying to export an IFC file with some pipes and pipe fittings, with Sketch Up Pro 2020. When I classify them with the classifier, as “IfcPipeSegmentType” or “IfcPipeFittingType”, they get exported as “IfcBuildingElementProxy”, and, sometimes, they just don’t go as components, and are exploded… Is there a way to classify them correctly and export them as pipes?

I have tried the latest version of the IFC Manager, and, the same things happened; also, some of the fittings had their positions changed with this plugin…