http://www.kendoui.com/forums/kendo-ui-web/grid/virtual-scrolling-for-hierarchy-grid-doesn-t-work-properly.aspx
As in the above link it is mentioned that vertical scroll is not supported with detail Template
Currently this bug is resolved or still it is unsupported
As in the above link it is mentioned that vertical scroll is not supported with detail Template
Currently this bug is resolved or still it is unsupported