title: EdgeClick on reactflow's subflow doesn't trigger
body: <p>I have my nodes like this</p>
  <pre><code>const nodes = [
    {
      id: 'A',
      type: 'group',
      data: { label: null },
      position: { x: 0, y: 0 },
      style: {
        width: 170,
        height: 140,
      },
    },
    {
      id: 'B',
      type: 'input',
      data: { label: 'child node 1' },
      position: { x: 10, y: 10 },
      parentNode: 'A',
      extent: 'parent',
    },
    {
      id: 'C',
      data: { label: 'child node 2' },
      position: { x: 10, y: 90 },
      parentNode: 'A',
      extent: 'parent',
    },
  ];
  
  export default nodes;
  </code></pre>
  <p>..and have connection between them</p>
  <pre><code>export default [{ id: 'b-c', source: 'B', target: 'C' }];
  </code></pre>
  <p>A is a parent node and B,C are its child nodes. But when clicking on edges with in a subflow group, the onEdgeClick does not trigger. But the same prop works when the edge is not inside a group ( subflow ) !</p>
  <p>Highly appreciate any help on which direction to look for a solution!</p>