2.1.430 Part 1 Section 17.15.2.3, bodyDiv (Data for HTML body Element)

a.   The standard states that if both this element and the blockQuote element ("[ISO/IEC-29500-1] §17.15.2.2; blockQuote") are specified, then this element shall be ignored.

Word ignores the blockQuote element in favor of this element if this div is a direct subelement of the divs tag.