Windows Explorer - some properties in details view show blank

I use the Choose Details menu in Windows Exploer detail view to add extra
columns showing information held in the File Properties fields of individual
files.
Most work as expected, however there are a few that don't: eg Keywords,
Company. They show blank, even if there is some content in the field (using
Word documents as an example).

Some fields in the Summary and in Custom Properties don't appear in the
Chooser list: eg Manager, and even if you create a custom property to match
these or any of the other options in the Chooser, they still appear blank.

Is this just a "feature" of Windows / Office? Perhaps someone has some
tricks to make this work better - which would be very useful !

Regards to all, sorry for long question,
--
Jazzer