Steps to Reproduce

 Use the page down key to scroll the screen view.

Current Result

The screen is scrolled until the end of the rendered view is reached.

Once the end of the view is reached, the render on demand events don't trigger, so it looks like part of the screen is missing.

The cell selection is not update by the scrolling.

The user can click to select a cell on the last rendered row and use left / right arrows to update the selection position.

If the user uses the down key, the selection will update to the next row, triggering a render on demand loading event.

See screenshots below.

initial state

(A1 is selected)

After page down:

view has scrolled to last rendered row (38), but A1 is still selected

Click on B38:

cell is last row is selected

User can use left right to select A38, C38, etc.

User press down from B38

Screen position is not updated, but the following rows are rendered

Possible improvements

 - Page down should trigger rows loading if part of the screen contain unloaded rows

Debug Information

Workaround