I placed SpringPanel.Begin in my event handler, when the item is clicked, SpringPanel.Begin(gameObject) is called. Where gameObject is the item I clicked (the topmost one that contains UIDragPanelContent).
What happens then is item disappears, it seems to be moved to some place in the drag list, which is not what I want so let me clarify what I want:
I have a scroll list.
When I click on an item I want the list to scroll until this item is at the center of the drag zone.