When elements are copyable, they can't be sorted in their origin container
Copying prevents original elements from being dragged. A copy gets created and that gets dragged instead
Whenever that happens, a cloned event is raised
Note that the clones get destroyed if they're not dropped into another container
You'll be dragging a copy, so when they're dropped into another container you'll see the duplication.
      
<div [dragula]='"fifth-bag"'></div>
<div [dragula]='"fifth-bag"'></div>

class VeryExample {
  constructor(private dragulaService: DragulaService) {
    dragulaService.setOptions('fifth-bag', {
      copy: true
    });
  }
}