TableView only renders the items that are visible. When clicking with the mouse on the scroller and moving it down, it doesn't render the visible items. When the mouse stops moving and the button is still pressed, nothing happens.

When I keep the mouse button pressed and I move the mouse button to the left or the right, the scroller loosed focus and it renders the items. When I scroll again down and stop, the items are not rendered. When I move my mouse and the scroller gets focus, it renders the items.

The items should also be rendered when the user stops scrolling (but still pushes on the button), even when the focus of the little scroller does not change.