Chrome扩展程序：后台脚本仅在第一次正常运行

我正在开发一个Chrome扩展程序，该扩展程序可以从麦克风和当前标签页接收音频。第一次可以正常运行，但是脚本在随后的运行中无法正确运行（它可以正常运行，但没有按预期运行）。

这是我的背景（非持久性）脚本的代码：

const audioContext = new AudioContext();
const destination = audioContext.createMediaStreamDestination();

const body = document.getElementsByTagName('body')[0];

let chunks = [],
  tabStream,
  micStream,
  tabAudio,
  micAudio,
  output,
  audioConfig,
  text = '',
  micable = true,
  paused = false;

const constraints = {
  audio: true,
};

function getTabAudio() {
  chrome.tabCapture.capture(constraints, (_stream) => {
    // keep playing the audio in the background
    const audio = new Audio();
    audio.srcObject = _stream;
    audio.play();

    tabStream = _stream;
    tabAudio = audioContext.createMediaStreamSource(tabStream);
    tabAudio.connect(destination);

    output = new MediaStream();
    output.addTrack(destination.stream.getAudioTracks()[0]);

    recorder = new MediaRecorder(output);

    recorder.start();

    recorder.ondataavailable = (e) => {
      chunks.push(e.data);
      // call download when recorder state is inactive
      if (recorder.state == 'inactive') download();
    };
  });
}

// get mic audio
function getMicAudio() {
  navigator.mediaDevices.getUserMedia(constraints).then((mic) => {
    micStream = mic;
    micAudio = audioContext.createMediaStreamSource(micStream);
    micAudio.connect(destination);

    // get tab audio
    getTabAudio();
  });
}

// start recording the stream
function startRecord() {
  getMicAudio();
}

// stop record -> stop all the tracks
function stopRecord() {
  recorder.stop();

  micStream.getTracks().forEach((t) => t.stop());
  tabStream.getTracks().forEach((t) => t.stop());
  output.getTracks().forEach((t) => t.stop());

  micable = true;
  chunks = [];
}

chrome.runtime.onMessage.addListener((request, sender, sendResponse) => {
  switch (request.type) {
    case 'record':
      startRecord();
      break;
    case 'stop':
      stopRecord();
      break;
    case 'pause':
      pauseResumeRecord();
      break;
    case 'mute':
      muteMic();
      break;
    default:
      break;
  }
});

为了使其再次正常工作，我必须刷新页面上的当前标签和扩展名chrome://extenions。

• 我没有使用任何onInstalled监听器。

任何帮助深表感谢！
提前致谢。