I have a document with a Table of Contents and am tracking changes. I save a new version after each significant update to the doc (version_1, version_2, etc.)

When creating a new version, the first thing I do is "Accept All Changes in Document" so all the review changes in this version include only the new changes. However, after I do this, when I do Select -> Select All -> F9, the "Update Table of Contents" dialog box does not appear. This was working earlier (version 5, version 6, etc) but has stopped working. Not sure if I inadvertently made a change to Word settings, but this is very frustrating! (and took awhile to figure out that it was the "Accept All Change" that triggered the "Update" to stop working).

Any clues?

TIA