undici: Error: connect ECONNREFUSED ::1:19001

Bug Description

(node:1800) ExperimentalWarning: Custom ESM Loaders is an experimental feature. This feature could change at any time
(Use `node --trace-warnings ...` to show where the warning was created)
(node:1800) DeprecationWarning: Obsolete loader hook(s) supplied and will be ignored: getFormat, transformSource
node:internal/process/esm_loader:91
    internalBinding('errors').triggerUncaughtException(
                              ^

Error: connect ECONNREFUSED ::1:19001
    at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1195:16) {
  errno: -4078,
  code: 'ECONNREFUSED',
  syscall: 'connect',
  address: '::1',
  port: 19001
}

import { ProxyAgent, request } from "undici";

const proxyAgent = new ProxyAgent("http://localhost:19001");

const {
    statusCode,
    body,
    headers,
} = await request("http://www.baidu.com", { dispatcher: proxyAgent });

console.log("response received", statusCode); // response received 200
console.log(headers);
for await (const data of body) {
    console.log("data", data.toString("utf8")); // data foo
}

Reproducible By

 npx esmo "C:\Documents\测试\test\test.ts"

Expected Behavior

(node:2384) ExperimentalWarning: Custom ESM Loaders is an experimental feature. This feature could change at any time
(Use `node --trace-warnings ...` to show where the warning was created)
(node:2384) DeprecationWarning: Obsolete loader hook(s) supplied and will be ignored: getFormat, transformSource
response received 307
{
  location: 'https://www.baidu.com/',
  vary: 'Accept-Encoding',
  'content-length': '0',
  date: 'Thu, 05 May 2022 07:24:45 GMT'
}

Logs & Screenshots

Environment

nodejs v18.1.0 undici 5.1.1

Additional context