Duplicate items in ePub menus

[#1]

I just started another project that publishes to ePub and found that it gave me duplicate menu items for each page, one which displayed the file name and another that uses the title I put in the book’s File Info -> Title field.

To troubleshoot I went back to the last ePub project I worked on and republished it. Now it too gives me duplicate menu items.

I recently updated my FrameMaker 2017 to the latest version (14.0.3.500).

Does anyone know if they made any changes to ePub publishing in recent updates?

Does anybody have an idea how I can fix my duplicate menu items problem?

Additional info: The duplicates appear in both __toc.xhtml and __toc.ncx. The following is a sample of the menu

Thanks for your help,

- Keith