EnumEditBox no description and always in flag mode

Hi,

I have a TreeListview and a EnumEditBox set as datatemplate for a column. I've tried following the demo example but I always get the checkboxes although I have no flag set.

Screenshot

<grids:TreeListViewColumn Header="Test Column" MinWidth="125" HeaderHorizontalAlignment="Center" CellHorizontalAlignment="Center">
                                    <DataTemplate>
                                        <editors:EnumEditBox MinWidth="125" Value="{Binding Type}" PlaceholderText="No type..." IsNullAllowed="False" HorizontalAlignment="Center" />
                                    </DataTemplate>
                                </grids:TreeListViewColumn>

 public TestEnumWithoutFlags Type { get; set; } = TestEnumWithoutFlags.SecondValue;

        public enum TestEnumWithoutFlags
        {
            [Description("This is the first value")]
            FirstValue = 0,
            [Description("This is the second value")]
            SecondValue = 1,
            [Description("This is the third value")]
            ThirdValue = 2
        }