Sortable's clone object is not positioned correctly on mouse

[june1661]

When I create multiple sortable lists with draggable items, I get an issue when the scrollbar appears because of the draggable items.

When I start to drag to another list, it'll cause the clone to be positioned a little off.

See example:
https://jsfiddle.net/vr0ydu4n/18/
Scroll to the bottom of the page then select '1. START DRAGGING to the...' element and move it to the top by scrolling at the same time.

Want to back this issue? Post a bounty on it! We accept bounties via Bountysource.