AdvStringGrid row lines still visible

I am trying to setup a gradient background where the grid lines are not visible.

I have set the following properties as an example:

   Background.Color := clGreen;
   Background.ColorTo := clWhite;
   GridLineWidth := 0.
   BackGround.Display := bdGradientHorz;
   Options := [];

However this results in the row lines still being visible when the gradient is used.
If I switch to using a solid background the row lines are not visible.

How can I make the row lines not visible?

We have traced & solved this problem. The next update will address this.