Textbox selection loses highlight color when context menu shown

When you select text inside an actipro textbox the selected text becomes highlighted.

if you right click to bring up a context menu the selected text loses its highlight color

A standard wpf textbox does not behave this way.

Is there a way to make the actipro behave like the .net textbox?

1. create a new wpf project
2. add a actipro textbox
3. add a contextmenu to the actipro textbox
4. add a .net textbox
5. add a contextmenu to the .net textbox
6. launch the application.
7. put some text in both text boxes
8. select some text in the .net textbox
9. right click on the .net textbox to bring up the context menu(notice the selection is still visible)
10. select some text in the actipro textbox
11. right click on the .net textbox to bring up the context menu(notice the selection is not visible)

<Window x:Class="WpfApplication4.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525" xmlns:editors="http://schemas.actiprosoftware.com/winfx/xaml/editors">
<Grid>
<editors:TextBox HorizontalAlignment="Left" Margin="121,204,0,0" Name="textBox1" VerticalAlignment="Top" Width="273" >
<editors:TextBox.ContextMenu>
<ContextMenu>
<MenuItem Header="test"></MenuItem>
</ContextMenu>
</editors:TextBox.ContextMenu>

</editors:TextBox>
<TextBox Height="23" HorizontalAlignment="Left" Margin="109,269,0,0" Name="textBox2" VerticalAlignment="Top" Width="120" >
<TextBox.ContextMenu>
<ContextMenu>
<MenuItem Header="test"></MenuItem>
</ContextMenu>
</TextBox.ContextMenu>