Changing ExportLinkedFiles of IFCExportConfiguration doesn't have any affect

I have links in my Revit project. If I export manually with "Export linked files as separate IFCs" checkbox enabled I got several IFC files in the output.
But if I use `IFCExportConfiguration` class from IFCExportUIOverride.dll to update my `IFCExportOptions` and set `ExportLinkedFiles` bool value to true I still got only one IFC file without links.

Start with IFCExportConfiguration and IFCExportOptions in IFCExportUIOverride.dll, then reproduce the export using a Revit project containing linked files. Compare the behavior with the manual "Export linked files as separate IFCs" option and verify that setting ExportLinkedFiles to true produces separate IFC output files.

Written by the indexing model from the issue text.