2.1.1761 Part 4 Section 188.8.131.52, doNotAutofitConstrainedTables (Do Not AutoFit Tables To Fit Next To Wrapped Objects)
a. The standard states that a table that is AutoFit and has a preferred width typically has its width reduced in order to allow a floating shape to wrap.
Word only reduces the width of tables that have no preferred width in order to allow a floating shape to wrap.
b. The standard states that when this element is present with a val attribute value of true, tables shall never have any preferred width overridden to allow them to wrap.
Word never allows tables to have their width reduced to allow them to wrap, even if they have no preferred width.