Data-bounded CommandBarDropDownList shows only currently selected item when the CommandBarDropDownList located into overflow list.

Workarround: Assign the CommandBar's BindingContext explicitly

	public partial class Form1 : Form
	{
		
		public Form1()
		{
			InitializeComponent();
                        this.commandBarDropDownList1.BindingContext = this.BindingContext;
		}