Has it been solved yet?
Which version of Feng Office are you using?
Are you 100% sure it is not a permissions issue?
Just in case, I would suggest you to rebuild what we call the sharing table by running this command in your console:
php FENG_ROOT/rebuild_sharing_table.php
Otherwise, if you still experience this odd issue and would like to get official support, feel free to send us an email to contact@fengoffice.com for further information.
Best regards,
Francisco