Forma tapping on superscript numbers don't work in a certain book, but works in android

In my Kobo Forma, when I'm reading a certain book*, I tap on some hyperlink superscript that should take me to the footnote/endnote, but nothing happens.


When I'm reading the same book on my Android, with the Moon reader app, the note pops up.

I have this problem both with an unpatched Kobo forma and when I patch it.


(*Note to self: RobRey's SysTh 2nd ed)