Created attachment 93309 [details]
The file used
The "special" page number field is not imported from an ABW file into LibreOffice.
Created attachment 93310 [details]
LibreOffice 18.104.22.168 (release) opening the file
Created attachment 93311 [details]
The same file, now opened in AbiWord 3.0.0
Confirming report, I was able to duplicate the issue on Fedora 20 with AbiWord 3.0.0 and LibreOffice 22.214.171.124. (Other general formatting from the ABW file is also not preserved on import in LibreOffice.)