When I export a book to ePUB (either adjustable or fixed layout) cross references or links to internal anchor text do not work. The code of links destination appears empty in files xhtml (href = ""). Instead hyperlinks to other web pages are exported properly.
Any expert knows a solution that does not pass through manually put the links in Sigil?
I see similar questions unanswered for several years.
Moving to InDesign EPUB forum