DWG Attached PDF references not appearing in PDF rendition

I need to know if the Auto rendition within PW can include an attached PDF to a DWG file.

Currently when we rendition a DWG file using 'create rendition' in ProjectWise, it works very well (amazingly!) with DWG objects.... but when a DWG has an attached PDF, lets say a a data sheet from a manufacturer, the resulting rendition includes all DWG objects, but complete ignores the PDF attachment, leaving a blank space where the attach should be. We are forced to batch plot those drawings to get the desired output.

Has anybody else come across this and been able to fix it?