The solution for me was as follows:
- Ensure all LibreOffice instances are closed
- Run LibreOffice
- Resize LibreOffice window to a desired state
- From LibreOffice window click “Writer Document” and close it
- Ensure that all LibreOffice instances are closed
- Open LibreOffice Writter normally and it will be the same size as when you closed LibreOffice Writer as per Step 4.