This may already be checked, but there was a simplification of the toc nav prose in 3.2 to make clear that the entries in the table of contents must be ordered to match the order in which content documents occur in the spine and any entries with fragment identifiers must be ordered to match the document order of the IDs within the content document.

Reference: https://w3c.github.io/publ-epub-revision/epub32/spec/epub-packages.html#sec-nav-toc