Disable _timestamp when using setXMLAutoLoadingBehaviour

Having a problem with autoloading behavior for dhtmlxTreeObject

DHX ALWAYS appends a timestamp when it tries to auto load a new node.

Code that initializes my tree:

roleTree = new dhtmlXTreeObject("treeBox","100%","100%", bottom_left_nav_selected);        roleTree.setImagePath("../components/dhtmlxSuite_v403_pro/sources/dhtmlxTree/codebase/imgs/web/");    roleTree.setIconsPath('../components/dhtmlxSuite_v403_pro/sources/dhtmlxTree/codebase/imgs/web/');
roleTree.preventIECaching(false);
roleTree.setXMLAutoLoadingBehaviour('name'); 
roleTree.setXMLAutoLoading('newroletree/');
roleTree.loadXML("newroletree/root/" + bottom_left_nav_selected, function() {
   mainLayout.progressOff();
});

Whenever a node is loaded request will look like

...newroletree/3_1428369188394

Which breaks my application. I tried using

window.dhx4.ajax.cache = true;

but I cannot remove _timestamp

Thank you for assistance

Hello
Please, check if all IDs are unique