Drag-and-drop of columns is broken in v4

Suite 7.0/6.0/5.0 and Optimus Suite 5.0
#1

In version 4, reordering of columns by drag-and-drop is not working. Even this sample page in the documentation doesn’t work:

dhtmlx.com/docs/products/dhtmlxG … veCol.html

#2

The issue is confirmed and fixed. Pleas,e open the ticket at support.dhtmlx.com to get the fix.