Cannot filter using "/" on a Date column in the livetable

#set($columns = ["_avatar", "first_name", "last_name", "email", "doc.creationDate", "_actions"])
#set($columnsProperties = {
    "_avatar" : { "type" : "none", "link" : "none", "html" : "true", "sortable":false },
    "first_name" : { "type" : "text" , "size" : 20, "link" : "view"},
    "last_name" : { "type" : "text", "link" : "view"},
    "email" : { "type" : "text" },
    "doc.creationDate" : { "type" : "text", "filterable" : true }
})
#set($options = { 
   "className":"XWiki.XWikiUsers",
   "translationPrefix" : "xe.index.users.",
   "tagCloud" : true,
   "rowCount": 10
})
#livetable("userdirectory" $columns $columnsProperties $options)