The grid uses it's own type of scrollviewer, have you tried to redo the style of the TableViewScrollViewer? Like the following :
<Style TargetType="xcdg:TableViewScrollViewer">
<Setter Property="HorizontalScrollBarVisibility"
Value="Visible" />
<Setter Property="VerticalScrollBarVisibility"
Value="Visible" />
</Style>
This worked for me, let me know !
Mathieu Drimonakos
-Technical Designer-