Uncaught async failure in `test_unload_while_contacting_node` on Mac

[qstokkink]

The following failure occurs in the tests.

______________ TestDHTCommunity.test_unload_while_contacting_node ______________
[gw2] darwin -- Python 3.8.18 /Users/runner/hostedtoolcache/Python/3.8.18/x64/bin/python
ipv8/test/base.py:189: in _callTearDown
    self._callAsync(self.tearDown)
../../../hostedtoolcache/Python/3.8.18/x64/lib/python3.8/unittest/async_case.py:80: in _callAsync
    return self._asyncioTestLoop.run_until_complete(fut)
../../../hostedtoolcache/Python/3.8.18/x64/lib/python3.8/asyncio/base_events.py:616: in run_until_complete
    return future.result()
../../../hostedtoolcache/Python/3.8.18/x64/lib/python3.8/unittest/async_case.py:102: in _asyncioLoopRunner
    ret = await awaitable
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
self = <ipv8.test.dht.test_community.TestDHTCommunity testMethod=test_unload_while_contacting_node>
    async def tearDown(self) -> None:
        """
        Tear down all the overlays, remove all files and check if any errors "escaped" the unit test scope.
        Always call this after your own tearDown!
        """
        try:
            for node in self.nodes:
                await node.stop()
            internet.clear()
        finally:
            while self._tempdirs:
                shutil.rmtree(self._tempdirs.pop(), ignore_errors=True)
        # Now that everyone has calmed down, sweep up the remaining callbacks and check if they failed.
        # [port] ``asynctest.helpers.exhaust_callbacks`` no longer works in Python 3.10
        while self.loop._ready:  # noqa: SLF001
            await sleep(0)
        # [end of ``asynctest.helpers.exhaust_callbacks`` port]
        if self._uncaught_async_failure is not None:
>           raise self._uncaught_async_failure["exception"]
E           KeyError: 'exception'
ipv8/test/base.py:279: KeyError
------------------------------ Captured log call -------------------------------
WARNING  RequestCache:requestcache.py:186 Dropping <Request find-15676> due to shutdown!