Some of my captions are missing from Word's cross-references list

When using Microsoft Word's caption and cross-referencing tools, only some of the figures with captions show up in the cross-referencing list (see the picture below). I've checked and double-checked, deleted and reinserted the captions, but they still won't show up.

Word cross reference list with half of captions missing


The problem appears to be related to Word's Track Changes feature. Figures or captions with changes pending are unavailable, or only some are available in the cross-reference list. After accepting all changes to figures and captions, the full list is available to cross-reference.