Note, you must have enough tasks such that they don't fit on the screen. The only way to fix this is to refresh the page. This only shows up when you have a lot of tasks. Sort tasks by priority with the arrow pointing up and the "3 Top" bar at the very top of the list. Click and drag a task. Drop it on the grey "3 Top" header bar. Scroll the lists of tasks with the mouse wheel. Notice it never stops trying to scroll up.