Hello.
Straight to the example:
Node Style definition (XAML):
<Style TargetType="sf:Node" BasedOn="{StaticResource NodeBindingStyle}">
<Setter Property="Shape" Value="{StaticResource Rectangle}" />
<Setter Property="UnitHeight" Value="30" />
<Setter Property="UnitWidth" Value="100" />
Visual result:
However if defined in code (in my case - in VM while initializing new NodeViewModel) node selection renders correctly.
So that seems like not normal behavior, isn't it?