RTF export compresses table columns making content unreadable on some documents

Steps to reproduce:

1. Have LibreOffice 25.8.4 installed
2. Configure Office Server from xwiki.properties
3. Make sure Server state is Connected in Administration
4. Select the attached Office document tabel_40_coloane.xlsx
5. Click on Import
6. Access the page
7. More actions -> Export -> RTF

Expected results:

The table layout should remain readable.