OnDrag - Object lagging behind the mouse cursor.

I'm using a IDragHandler to take care of my object drag & drop. However the object is always lagging a bit behind the mouse cursor. I first thought it's an editor issue, but it happens as well in a standalone build. Anyone knows how to fix this?

 public void OnDrag(PointerEventData eventData)
     {
         Vector2 localPointerPosition;
         if (RectTransformUtility.ScreenPointToLocalPointInRectangle(this.transform.parent.GetComponent<RectTransform>(), Input.mousePosition, eventData.pressEventCamera, out localPointerPosition))
            this.transform.localPosition = localPointerPosition - offset;
     }