Issue with footnote pop-up (epub3)

First, I love the version 5 viewer--getting ever better!
Now, the issue.
As seen in the attachment, the note shows an additional line--repeated for every last note in each chapter.
Cause: notes in this book are collected in an end-notes page, with a heading separating chapters, as in this code:

I tried replacing the original <h2> tags with <p>, with no effect: apparently the involved script uses next class="footnote"
as boundary for 'footnote grabbing'...
Thus, my question: is there any way out, barring removing chapter headings? Maybe <hr/> before each heading...?
It would be simple to introduce (search & replace), and can be given 'display= none'.
Thanks!

Attached Thumbnails