Getfields for Address Entity returns World Region with no type

To reproduce, Using API Explorer run Getfields for Address and the last entry shows only name and title of "World Region".
{

{ "name":"manual_geo_code", "type":16, "title":"Is manually geocoded" }

,

{ "name":"timezone", "type":2, "title":"Timezone", "maxlength":8, "size":8 }

,

{ "name":"name", "type":2, "title":"Address Name", "maxlength":255, "size":45, "import":true, "where":"civicrm_address.name", "headerPattern":"\/^location|(l(ocation\\s)?name)$\/i", "dataPattern":"\/^\\w+$\/", "export":true }

,

{ "name":"master_id", "type":1, "title":"Master Address Belongs To", "import":true, "where":"civicrm_address.master_id", "headerPattern":"", "dataPattern":"", "export":true, "FKClassName":"CRM_Core_DAO_Address", "FKApiName":"Address" }

,

{ "title":"World Region", "name":"world_region" }

]
}