Mouse pointer out of sync with the draggable object

Mouse pointer out of sync with the draggable object

Mouse pointer out of sync with the drag-gable object. I am using jQuery
library
Here is my code
$("#id").draggable({ revert: "valid" });
Horizontal direction, it is working fine.
Vertical direction, Cursor and draggable object out of sync.
Can any one help me to fix it ?