The modification of toc.ncx is over.
epub3 works with nav.xhtml, and toc.ncx is only prepared formally for backward compatibility.
There are many epub that have nothing written on toc.ncx or that don't have it.
Is there any follow-up to epub3 with this modification?
Isn't this problem caused by toc.ncx as the main?
https://www.mobileread.com/forums/sh...d.php?t=325162