Bug RectangleSelector needs an offset in the right side of a TwoPaneSplitView

Everything is in the title. No problem if it is in the bottom side. (Unity 2020.2.b13)

Code (CSharp):

1. TwoPaneSplitView hSplit = new TwoPaneSplitView(0, 192f, TwoPaneSplitViewOrientation.Horizontal );
2. hSplit.Add(new VisualElement());
3. hSplit.Add(GraphView);