Click and hold of scrollbar down arrow for Infinite Scroll fails to continue to scroll after more data is loaded

There is an issue with Infinite scroll when you click and hold on the down arrow in the vertical scroll bar. It properly continues to scroll until you reach the threshold to load data then it stops scroll, but note that the scroll thumb has moved up. To see this behavior go to http://ui-grid.info/docs/#/tutorial/212_infinite_scroll and simply click and hold the down arrow in the scroll bar and note that it will stop.

I tried to track down what would be needed to fix this, but was unsuccessful what may need to be done to fix.