Failure of internal links
I use MS Word 365 and Acrobat DC for writing technical manual. Until a few days ago, when I add a hyperlink to a heading to link it backwards to the automatically generated table of contents, the 2-way link existed in the PDF version when I converted it using Acrobat. But now, no links at all appear in the PDF version! Has anything recently changed in Acrobat DC, or Word 365?
The 2-way links are functioning normally in the Word file.