When using the IFC STEP/XML reader and writer as a just plain import > export, I've noticed that some IfcWallStandardCase are automatically converted to IfcTrapeziumProfileDef although the export object name is IfcWallStandardCase. Therefore some the IFC is broken as some object's can be displayed anymore in other software (xBIM Explorer). The issues occurred on a more complex workspace but I've tried it on the most simplified workspace, and there I do have the same issue.
Is this a bug or can i do something to fix this?