problem with bookmarks and cross-ref

Hello Team,

Greetings from New Zealand from first timer to your users group.

the bookmarked and cross-ref’ed links appear and work in my Mac LO version ( 4341 )

                             ….. clip of text from my document
                                the blue text are cross-refs that link to bookmarks in the document, it works nicely.

My Problem:

but if I load the file in PC LO version (same when tried with AOO and NeoO) or any saved MS Word format, the links either no longer work or display incorrectly

         same document opened in PC LO (in .odt format)

                                             opened in Word on PC

the NAMES are replaced by numbers (that do work as links) or Names that are close to the expected text but don’t work.

                          Saved as .docx on Mac and opened in mac LO

thank you