Table of contents links not working when save as PDF

In other words, I’m still experiencing issues with Word to PDF (best for electronic distribution). For the last year, I’ve been building a few hundred page electronic training manual. I’ve built the Word doc for ease of access so people can jump back and forth (did this using header cross reference points). I’ve had zero issues converting to the PDF before October. Now all my cross reference points are “un-clickable”. Trying not to panic, but this document is used company wide so I’m getting a bit worried lol

Hi jamalali2022 thank you for taking the time to help. That is how I’ve always converted my Word documents to PDF (never printing to PDF), always saving as (best for electronic version). Despite this, Microsoft’s recent iOS update in October broke this ability to retain embedded (cross referenced) links, including the TOC. Only external links remain.