Datagrid Virtualization & RowExpand

Hello all,
is it right that the RowExpand Event doesnt fire when the datagrid is set to virtualization = true?
When i do so the rwoExpand doesnt work. Setting virtualization fals/off and paging is on the RowExpand works fine.

please help

We are not aware of such issue. Everything works normally when virtualization in on in this demo: