Update query with returning returns empty array

Node.js SDK
1

I have this n1ql query:

UPDATE default
USE KEYS '557a7628-1217-4974-95cf-d64247c560cd'
SET p.last_seen_message_id = 'e5010536-7fde-42c1-9fea-e4a29e560f53'
FOR p IN participants WHEN p.id = '119c35ab-a1cc-4e9f-bab5-d58d6d396623' END
WHERE doc_type = 'conversation'
RETURNING default.*

The documents have the following structure:

"default": {
  "doc_created_at": "2016-09-26T05:59:03.288Z",
  "doc_created_by": "119c35ab-a1cc-4e9f-bab5-d58d6d396623",
  "doc_id": "557a7628-1217-4974-95cf-d64247c560cd",
  "doc_patched_at": "2016-11-09T14:01:00.098Z",
  "doc_type": "conversation",
  "last_message_id": "e998a087-c0d1-4f62-9e0d-86899e408e40",
  "last_message_text": "19",
  "participants": [
    {
      "id": "6e1a1ab9-1082-4250-bcb1-773df70fd206",
      "last_seen_message_id": "unknown",
      "name": "User 2"
    },
    {
      "id": "119c35ab-a1cc-4e9f-bab5-d58d6d396623",
      "last_seen_message_id": "unknown",
      "name": "User 1"
    }
  ],
  "sender": {
    "id": "119c35ab-a1cc-4e9f-bab5-d58d6d396623",
    "name": "User 1"
  },
  "text": "19"
}

The update works (the document is updated correctly) but the result is an empty array. I tried this query using the Couchbase Console Query editor and there I get the result back.

I use Couchbase 4.5.1-2845 on Windows, Node.js version 6.5.0, and the couchbase 2.2.2 module (from npm).

2

I found the problem and it is not related to Couchbase.