Experimental: Announcement status invalid

[jasongerbes]

When dragging an item in the experimental multiple sortable lists example, the value of the id="dnd-kit-announcement-2" gets set to invalid values, for example:

Draggable item A0 was moved over droppable target A0.

When the item is dropped, the value changes to:

Draggable item A0 was dropped over droppable target A0

I'm assuming this is a bug as an element cannot be dropped over itself