EPUB conversion missing title page

I have been mass converting documents, and have noticed that a very small portion of Epubs are not having their title_page.xhtml converted correctly.

I (think) it is becauses these have special characters in the title ( "()<>" ), but I'm not sure how to look further into it. As far as I can tell, the first block that anydoc is registering is from the next chapter/file in the epub.