[xwiki-users] Can not filter livetable on doc.title

Hi, I create livetables with doc.title as a column. By default, this column does not show as filterable. When I force filtering by "filterable:true", I can type in this field but nothing shows up as result. The property doc.name can be used and filtered as expected. I have created an example: http://playground.xwiki.org/xwiki/bin/view/Sandbox/Livetable Should I report his as a bug or did I overlook something?