One possibility would be that a page break was taken in Word that cannot be recognized in Writer.
Problems can occasionally arise between different office programs. Therefore:
Always create and save your files in LibreOffice and save them in ODF format (ODT, ODS, etc.).
Always keep these files as their source. If you need other formats for distribution to partners, you can open an ODF file and save and distribute another format with ″ Save as… ″.
This way, you always have working files available in your system environment.
Please report the behavior as a bug in Bugzilla.
Please announce the link from the bug here.
To do this, edit your initial question. Thank you.