I tried what you suggested and it did not change the result. I have attached the new inkscape file and resulting pdf.
Yes, this drawing did originate in Illustrator.
Unfortunately I have several large documents created in Illustrator that I need to continue using.

I'm brand new to Inkscape, coming from Illustrator. I've got a drawing with numerous elements. When I print to PDF most of the elements are missing. If I export to PDF then many, but a few less, elements are still missing. Only one text box prints, the others don't. If I add a simple element like a ...