This issue can be reproduced locally if you set the DataNavigationMode property to the VirtualScrolling value in the Data Grid - Custom Data Source demo.
DataGrid for Blazor - Virtual scrolling doesn't work if the grid is bound using the CustomData property
Answers approved by DevExpress Support
We have fixed the issue described in this ticket and will include the fix in our next update. The update will be available via the DevExpress NuGet server. Refer to this page to obtain your personal NuGet feed URL.