XWikiHibernateBaseStore related error when editing in realtime

I reproduce this error on 18.4.4 with following steps:

1. Go to Administration -> Content -> Localization
2. Set Multilingual to "Yes"
3. Set "Supported languages" to "en,fr"
4. Set "Default Language" to "en"
5. Click Save
6. Create 2 new pages (1 Non-Terminal and 1 Terminal)
7. For each of the 2 pages follow these steps:
   • Edit the page (WYSIWYG mode)
   • Add some content for the English version e.g. English page! and change the title
   • Click "Save & View"
   • Click on the Information tab and under Translations on French
   • Add some content for the French version of the page e.g. French page! and change the title
   • Click "Enregistrer & fermer" (Save & View)
   • Observe the saved content
8. Switch between the 2 languages from the top right Drawer -> Languages

Please note that on 17.10.12 I can't reproduce.