To reproduce: - Set the text of a GroupElement in the GroupElementFormatting event handler.
- Start the grid and resize a column for example.
- You will notice the the text is reverted to its original value.

Workaround:
- Use the following CustomGroupElement class: public class CustomGroupElement : PivotGroupElement { protected override void SynchronizeProperties() { base.SynchronizeProperties(); this.Text = "test"; } protected override Type ThemeEffectiveType { get { return typeof(PivotGroupElement); } } }
- you can replace the default element with the custom one in GroupElementCreating event handler: Private Sub radPivotGrid1_GroupElementCreating(sender As Object, e As PivotGroupElementCreatingEventArgs) e.GroupElement = New CustomGroupElement() End Sub