PurgeApi: bulkPurgeTag returns an object with index as keys and each letter of value as value

[Crowelling]

Version

"fastly": "7.1.0"

What happened

When i try to get the response for the request

import * as Fastly from 'fastly';

const token = 'my-token';
Fastly.ApiClient.instance.authenticate(token);
const fastlyPurgeApi = new Fastly.PurgeApi();

const options = {
      service_id: 'my-service-id',
      fastly_soft_purge: 1,
      purge_response: {
        surrogate_keys: ['dev', 'android'],
      },
    };

const response = await this.fastlyPurgeApi.bulkPurgeTag(options);

, i'm getting the response as object and it looks like this:

  '0': '{',
  '1': ' ',
  '2': '"',
  '3': 'd',
  '4': 'e',
  '5': 'v',
  '6': '"',
  '7': ':',
  '8': ' ',
  '9': '"',
  '10': '1',
  '11': '4',
  '12': '1',
  '13': '0',
  '14': '0',
  '15': '3',
  '16': '4',
  '17': '-',
  '18': '1',
  '19': '7',
  '20': '1',
  '21': '3',
  '22': '2',
  '23': '2',
  '24': '7',
  '25': '2',
  '26': '7',
  '27': '7',
  '28': '-',
  '29': '4',
  '30': '0',
  '31': '2',
  '32': '2',
  '33': '8',
  '34': '4',
  '35': '8',
  '36': '"',
  '37': ',',
  '38': ' ',
  '39': '"',
  '40': 'a',
  '41': 'n',
  '42': 'd',
  '43': 'r',
  '44': 'o',
  '45': 'i',
  '46': 'd',
  '47': '"',
  '48': ':',
  '49': ' ',
  '50': '"',
  '51': '1',
  '52': '4',
  '53': '1',
  '54': '0',
  '55': '0',
  '56': '3',
  '57': '4',
  '58': '-',
  '59': '1',
  '60': '7',
  '61': '1',
  '62': '3',
  '63': '2',
  '64': '2',
  '65': '7',
  '66': '2',
  '67': '7',
  '68': '7',
  '69': '-',
  '70': '4',
  '71': '0',
  '72': '2',
  '73': '2',
  '74': '8',
  '75': '4',
  '76': '9',
  '77': '"',
  '78': ' ',
  '79': '}'
}

Is it okay response? Or not? I didn't find any information about it, in docs, or in the code.

[zhiln]

experiencing same behaviour

[harmony7]

Updating this ticket to mark that an internal ticket exists to track this issue.