"NonShareable" exception on expanding a LayoutGroup when the group's child has a binding on the IsEnabled property

Hy DevExpress Team,

we have one CheckEdit and one Button within a LayoutGroup. The Button "IsEnabled" Property is bound to the "IsChecked" Property from the CheckEdit-Control.

When we first collapse and then expand this LayoutGroup, we get the following exception:

"ArgumentException was unhandled.
Cannot set Expression. It is marked as 'NonShareable' and has already been used"

Code:
<lc:LayoutControl>
         <lc:LayoutGroup
            Header="LayoutGroup"
            View="GroupBox"
            IsCollapsible="True"
            Orientation="Vertical">
            <dxe:CheckEdit
               HorizontalAlignment="Left"
               VerticalAlignment="Top"
               x:Name="_checkbox"
               Content="Example Checkbox" />
            <Button
               Content="Button"
               IsEnabled="{Binding IsChecked, ElementName=_checkbox}"
               HorizontalAlignment="Stretch"
               VerticalAlignment="Stretch"
                />
         </lc:LayoutGroup>
</lc:LayoutControl>

Thanks Stefan