sidebar when filter and collapse level 3 and more not filter

Hi,

In a sidebar when it is closed or open I can only filter the first and second level the third level is no longer filtered

Please look at the snippet and check that the item “Report > Report 2> Report 2.2.1” is not filtered, neither open nor close the sidebar.

https://snippet.webix.com/sx47ybhu

Thanks in advance!