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.)
Fixed by https://gerrit.libreoffice.org/gitweb?p=libabw.git;a=commitdiff;h=1ff9c4c4755123cf31b185a0416394f69c48d064 .