Datatable filter select bug

Webix JS
#1

When you try to select text in the filter, you can only move the header.
https://snippet.webix.com/1xejw4tr

#2 
webix.attachEvent("onDataTable", function(table, config) {
        table.attachEvent("onBeforeColumnDrag", function (source, e) {
            if ((e.target || e.srcElement).className.indexOf("webix_hcell") == -1)
                return false;
        });
});

should be used only once at the very beginning

#3

Hi,
I can confirm the issue. Thank you for the report! We will fix it.