node js fulfillmentHandler0 undefined with promises

Question

我有一个执行以下操作的功能：

function getUrl(id) {
    let params;
    return attModel.getById(id)
      .then(resData => {
        const attachmentMetaData = resData.shift();
        params = {
           Bucket: 'some-bucket',
           Key: [
             attachmentMetaData.fieldA,
             attachmentMetaData.fieldB,
             attachmentMetaData.fieldC
           ]
        };
        return isEnabled(attachmentMetaData.fieldD);
  })
  .then(isEnabled => {
    if (isEnabled) params.Key[1] = '0';
    params.Key = `${params.Key.join('/')}.png`;
    return params;
  })
  .then(params => { return s3.getSignedUrl('getObject', params); });
}

当我从控制器调用此函数时，以及console.log结果，我得到以下内容：

Promise {
  _bitField: 0,
  _fulfillmentHandler0: undefined,
  _rejectionHandler0: undefined,
  _promise0: undefined,
  _receiver0: undefined,
  _trace: 'some traces ...'
}

我已按照Promise fulfillment handler undefined的建议尝试附加.then，但仍会得到相同的结果。