<StackPanel>
   <igEditors:XamComboEditor x:Name="xamComboEditor1"/>
   <ComboBox x:Name="comboEditor"/>
</StackPanel>

using System.Collections.Generic;
using System.Windows;

namespace DataGridTest
{
    public partial class ComboEditorTest : Window
    {
        private class ComboEditorTestItem
        {
            public int ID { get; set; }

            public string Name { get; set; }
        }

        public ComboEditorTest()
        {
            InitializeComponent();

            List<ComboEditorTestItem> data = new List<ComboEditorTestItem>();
            data.Add(new ComboEditorTestItem() { ID = 1, Name = "First" });
            data.Add(new ComboEditorTestItem() { ID = 2, Name = "Second" });
            data.Add(new ComboEditorTestItem() { ID = 3, Name = "Third" });

            xamComboEditor1.DisplayMemberPath = "Name";
            xamComboEditor1.ValuePath = "ID";
            xamComboEditor1.ItemsSource = data;
            xamComboEditor1.IsEditable = true;

            comboEditor.DisplayMemberPath = "Name";
            comboEditor.SelectedValuePath = "ID";
            comboEditor.ItemsSource = data;
            comboEditor.IsEditable = true;
        }
    }
}

When typing "Sc" into the Editor 8 exceptions raise up in the output window of visual studio:

A first chance exception of type 'System.FormatException' occurred in mscorlib.dll
A first chance exception of type 'System.Exception' occurred in System.dll
A first chance exception of type 'System.FormatException' occurred in mscorlib.dll
A first chance exception of type 'System.FormatException' occurred in mscorlib.dll
A first chance exception of type 'System.FormatException' occurred in mscorlib.dll
A first chance exception of type 'System.Exception' occurred in System.dll
A first chance exception of type 'System.FormatException' occurred in mscorlib.dll
A first chance exception of type 'System.FormatException' occurred in mscorlib.dll

They do not occur using the default ComboBox from WPF. How can I get rid of them using the XamComboEditor?