To reproduce: - Implement the example from this page http://www.telerik.com/help/winforms/pageview-how-to-editing-page-tabs.html. - Set the page text to empty string and click on another page. Workaround: subscribe to the editor's element RadPropertyChanging event: void element_RadPropertyChanging(object sender, RadPropertyChangingEventArgs args) { if (args.Property == RadElement.ContainsFocusProperty) { if (!(bool)args.NewValue) { args.Cancel = true; } } }