When I have DistinctFilter set on the grid and I will search data from SearchPanel and then I will clear SearchPanel, Grid show me all data, not these from DistinctFilter, even if it's still set on the grid.

UI for WPF Q1 2016

Implement Excel-like horizontal locked scrolling. Clicking on the scrollbar should scroll into view the first column that is not visible at the moment, i.e. all visible columns should be moved out of the viewport.

UPDATE: The issue is reproduced with columns bound to other data types as well.

Respect IVirtualizedItemProvider for items of RadGridView . 

The problem should be resolved with LIB version 2016.1.404.

When tabbing in grouped RadGridView placed in Grid with another visual element inside it, GroupRenderMode is set to Flat  and second group is not in ViewPort, selected row changed its state to Unfocused.

Workaround: reused the cell element like this:
CreateCellElement(Telerik.Windows.Controls.GridView.GridViewCell cell, object dataItem)
{
    var button = cell.Content as Button;
    . . .
 
    return button;
}