When using grouping (treeview?) and filtering a field the grid always collapses although the grid icon is in (-) expanded state. Steps: 1 - expand entire grid 2 - filter by gender type something ex. "m" 3 - remove filter 4 - grid has collapsed http://plnkr.co/edit/ry9Avv9jjkmJEsWwBC6U?p=preview