Are your documents in the book of different page sizes? Have you done any edits to page size using Page tool and not using Document set up dialog?
We honor only the document set up dialog changes and not the changes made to page size using page tool so this could be one of the reason for things going wrong.
It would be really nice if you could share your document on dropbox may be and share the link with me at: email@example.com This way it would be easy for me to investigate and tell you why this issue is happening.
The same size and no edits to page size.Just a simple create document, mount pdf/jpg on every page, export to epub. Nothing else.
I will send you a packade with sprend so that you can download the documents.
Thanks for sharing the files. The image getting repeated on every page in case of placed PDF is an EPV(Exist in previous version) issue i.e. it exists in Reflowable EPUB in CC 9.2.
This happens only in case of PDF and not otherwise. The workaround is to make changes to the image placed on every page either in terms of size or attributes like transparency, stroke, fill etc.
I know the workaround is not feasible but this is the only option to deal with this issue till the time this bug gets fixed. Please let me know if the problem still persists even after doing these steps.
Kindly share to me also.