Win10/64-Pro, InDesign 16.0.1/64

A book with 53 chapters fails to detect edited chapters when re-synching.

This problem did not occur with other recent updates of InDesign. Normally, when a chapter-file has been edited, a yellow bullet appears next to the filename in the Book chapter list. This isn't happening, because the files are not being detected as edited. Perhaps the book feature's metadata was corrupted by the update from 16.0.0 to 16.0.1?

When I rebuild the book, even after full re-synch and renumber operations, chapters whose files have just been edited are not updated.

The only way I can get an up-to-date PDF output is to manually remove all the edited chapter-files and then re-add them to the book's chapter list.

Needless to say, this is a huge inconvenience. It has also caused several problems by generating "new" PDFs that were not actually updated!