How to get IMU data and audio data simultaneously in App

I want to record both IMU data and Audio data from Airpods Pro. I have tried many times, and I failed. I can successfully record the IMU data and iPhone's microphone data simultaneously. When I choose Airpods Pro's microphone in the setCategory() function, the IMU data collection process stopped.

If I change recordingSession.setCategory(.playAndRecord, mode: .default, options: .allowBluetooth) to ecordingSession.setCategory(.playAndRecord, mode: .default), everything is okay except the audio is recorded from the handphone. If I add options: .allowBluetooth, the IMU update will stop. Could you give me some suggestions for this?

Below are some parts of my code.

  let My_IMU = CMHeadphoneMotionManager()
  let My_writer = CSVWriter()
  var write_state: Bool = false
  func test()
  {
    recordingSession = AVAudioSession.sharedInstance()

    do {
      try recordingSession.setCategory(.playAndRecord, mode: .default, options: .allowBluetooth)
      try recordingSession.setActive(true)
      recordingSession.requestRecordPermission() { [unowned self] allowed in
        DispatchQueue.main.async {
          if allowed == false {print("failed to record!")}
        }
      }
    } catch {
      print("failed to record!")
    }
     
     
    let audioFilename = getDocumentsDirectory().appendingPathComponent("test_motion_Audio.m4a")
    let settings = [
      AVFormatIDKey: Int(kAudioFormatMPEG4AAC),
      AVSampleRateKey: 8000,
      AVNumberOfChannelsKey: 1,
      AVEncoderAudioQualityKey: AVAudioQuality.high.rawValue
    ]
    do
    {
      audioRecorder = try AVAudioRecorder(url: audioFilename, settings: settings)
      audioRecorder.delegate = self
      audioRecorder.record()
    }
    catch
    {
      print("Fail to record!")
      finishRecording()
    }
     
    write_state.toggle()
    let dir = FileManager.default.urls(
     for: .documentDirectory,
     in: .userDomainMask
    ).first!
     
    let filename = "test_motion_Audio.csv"
    let fileUrl = dir.appendingPathComponent(filename)
    My_writer.open(fileUrl)
     
    APP.startDeviceMotionUpdates(to: OperationQueue.current!, withHandler: {[weak self] motion, error in
      guard let motion = motion, error == nil else { return }
      self?.My_writer.write(motion)
    })
  }