got: "RequestError: socket hang up" in `.json()` within `afterResponse` hook and agent keepAlive

Describe the bug

• Node.js version: 12.16.1
• OS & version: lastest MacOS

Updating from working got@10 to got@11.0.2

Consider this snippet:

    const opportunitiesIterator = client.paginate<Opportunity>('Opportunities', {
      json: { filter: [{ someField: 'someValue' }] },
    });
    for await (const record of opportunitiesIterator) {
      // Some processing
    }

the client variable is a got@11.0.2 instance with the following notable options:

• agent with Agent({ keepAlive: true }) for both http and https
• prefixUrl with public https base url of our Sugar CRM rest api
• allowGetBody as true for most CRM queries implies an http GET with a body full of json
• hooks.afterResponse with an async function to acquire/renew OAuth token
• mutableDefaults as true
• pagination.paginate and pagination.transform

Actual behavior

Upon first evaluation of for await (const record of opportunitiesIterator) there is this error:

✖ [ERROR] RequestError: socket hang up
    at ClientRequest.<anonymous> (/Users/guillaumec/rc-dev/rcsf/node_modules/got/dist/source/core/index.js:759:25)
    at Object.onceWrapper (events.js:418:26)
    at ClientRequest.emit (events.js:323:22)
    at ClientRequest.origin.emit (/Users/guillaumec/rc-dev/rcsf/node_modules/@szmarczak/http-timer/dist/source/index.js:39:20)
    at TLSSocket.socketCloseListener (_http_client.js:400:11)
    at TLSSocket.emit (events.js:323:22)
    at net.js:668:12
    at connResetException (internal/errors.js:604:14)
    at TLSSocket.socketCloseListener (_http_client.js:400:25)
    at TLSSocket.emit (events.js:323:22)
    at net.js:668:12
    at TCP.done (_tls_wrap.js:556:7) {
  name: 'RequestError',
  code: 'ECONNRESET',
  timings: {
    start: 1587549556887,
    socket: 1587549556887,
    lookup: undefined,
    connect: undefined,
    secureConnect: undefined,
    upload: undefined,
    response: undefined,
    end: undefined,
    error: 1587549556888,
    abort: 1587549556889,
    phases: {
      wait: 0,
      dns: undefined,
      tcp: undefined,
      tls: undefined,
      request: undefined,
      firstByte: undefined,
      download: undefined,
      total: 2
    }
  }
}

Expected behavior

Well, it shouldn’t crash, should it?

Code to reproduce

// working on it...

Checklist

• I have read the documentation.
• I have tried my code with the latest version of Node.js and Got.