Dragging in a listview shifts by 1 pixel each drag

When implementing a drag/drop between two listviews, i noticed that every drag/drop will shift the listview item in question by one pixel. 

I tried attaching to the Drag.onDragFinished signal and reset the x and y positions after the drag, but the shift seems to be happening after this signal, so anything you do here is ignored.

The only way to reset it i've found is to start a 1ms timer on the drag finished to reset after this signal is completed.

I attached a project that shows this issue. basically it will keep shifting every drag. I would expect there to be no shift.