IE: Native tooltip appearing when hovering jQuery UI Tooltip

See Fiddle here: https://jsfiddle.net/18j74xms/

This issue is only reproducible in IE browsers.

1. Set a tooltip with track to true and disable the animations (show & hide).

2. Enable the tooltip in a element big enough to show the tooltp within itself.

3. Hover the element. When the tooltip appears, quickly hover the tooltip.

Expected: The tooltip will be repositioned based on the new mouse position.

Current: The tooltip is closed, and the native tooltip appears.

This is not happening if animations are enabled for show & hide.