No info about the comment a reply belongs to?

Hi,

I am using the Box REST API to get the comments of BoxFiles. This is a example JSON of a reply to a comment:

{
  "type": "comment",
  "id": "removed for privacy",
  "is_reply_comment": true,
  "message": "@testuser1 dsfsdfsdf\n",
  "created_by": {
    "type": "user",
    "id": "removed for privacy",
    "name": "testuser1",
    "login": "***@example.com"
  },
  "created_at": "20**removed**T05:35:**removed**:00",
  "item": {
    "id": "removed for privacy46",
    "type": "file"
  },
  "modified_at": "20**removed**T05:35:**removed**:00"
}

I am wondering that while it is a reply to another comment in "item" it contains the id of the file and not the comment that was replied. Is that a bug? I see no way to reconstruct the comment hierarchy with this information.

Greetings,

Pascal