Attribute as sub level is not highlighting

Hi. I have react instant search where JSON is nested key values.

{
  "id": "data-display",
  "title": "Data Display",
  "type": "group",
  "children": [
    {
      "id": "avatars",
      "title": "Avatar",
      "type": "item",
      "url": "/avatars"
    },
    {
      "id": "badges",
      "title": "Badges",
      "type": "item",
      "url": "/badges"
    },
    {
      "id": "chips",
      "title": "Chips",
      "type": "item",
      "url": "/chips"
    }
  ],
  "objectID": "25282de7046a4_dashboard_generated_id"
}

So problem is that when I use highlight of title attribute, it highlight only parent, no child is getting highlighted.

See here: blissful-wood-1l4fd - CodeSandbox