dhtmlx grid tab order with reverse tab order

We are using dhtmlx 2.1 version, in gird i am using



myGrid.setExternalTabOrder(“PreviousTelelines”,“NewPhoneNo”); for tab order.



The Tab order PreviousTelelines ->Grid Rows -> NewPhoneNo



But my question is when user wants to reverse tab shift+tab the reverse tab order is not working from NewPhoneNo -> Grid entries -> PreviousTelephonelines.



Which method do i need to use for reverse tab order.



Unfortunately we cannot reproduce this issue at the latest version of dhtmlxGrid. Please check example here dhtmlx.com/docs/products/dht … _only.html