After stopping pulseaudio-dlna, errors occur

[emk2203]

System: Impish Indri from 2021-09-18, pulseaudio-dlna 0.5.3+git20200929-0.1

After shutting down pulseaudio-dlna with Ctrl-C, errors occur:

^CApplication is shutting down ...
09-18 10:22:32 pulseaudio_dlna.pulseaudio INFO PulseWatcher.shutdown()
09-18 10:22:32 pulseaudio_dlna.holder INFO Holder.shutdown()
09-18 10:22:32 pulseaudio_dlna.streamserver INFO StreamServer GobjectMainLoopMixin.shutdown()
09-18 10:22:32 pulseaudio_dlna.pulseaudio INFO Remove "vsxs520d_dlna" sink ...
Process Process-3:
Traceback (most recent call last):
  File "/usr/lib/python3.9/multiprocessing/process.py", line 315, in _bootstrap
    self.run()
  File "/usr/lib/python3.9/multiprocessing/process.py", line 108, in run
    self._target(*self._args, **self._kwargs)
  File "/usr/lib/python3/dist-packages/pulseaudio_dlna/holder.py", line 67, in search
    time.sleep(0.1)
KeyboardInterrupt

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3.9/multiprocessing/process.py", line 318, in _bootstrap
    util._exit_function()
  File "/usr/lib/python3.9/multiprocessing/util.py", line 360, in _exit_function
    _run_finalizers()
  File "/usr/lib/python3.9/multiprocessing/util.py", line 300, in _run_finalizers
    finalizer()
  File "/usr/lib/python3.9/multiprocessing/util.py", line 224, in __call__
    res = self._callback(*self._args, **self._kwargs)
  File "/usr/lib/python3.9/multiprocessing/queues.py", line 201, in _finalize_join
    thread.join()
  File "/usr/lib/python3.9/threading.py", line 1053, in join
    self._wait_for_tstate_lock()
  File "/usr/lib/python3.9/threading.py", line 1069, in _wait_for_tstate_lock
    elif lock.acquire(block, timeout):
KeyboardInterrupt