Drag stop (onStop) not called when dropped at the border of bound parent

[mulgurul]

I have a problem in my solution where I'm using Draggables with bound set to parent element.
When I drag and release mouse I get dragstop event, but not if the Draggable has been dragged all the way out to the parent border. Then theres no event.

Have anyone a clue what this could be caused by?

BR Peter