A family of Microsoft word processing software products for creating web, email, and print documents.
Cross-references make use of bookmarks in Word, and cross-references are vulnerable because bookmarks are vulnerable.
The problem is that you can easily redefine the range which a bookmark encloses, by mistake and without realizing what you have done (because cross-reference bookmarks are hidden in Word). This happens when you press Enter and/or add content at the beginning of a bookmarked item. Word expands the bookmark which may result in an incorrect cross-reference.
Long-term, you need to avoid adding content or pressing Enter at the beginning of a bookmarked/cross-referenced paragraph.