when i exec master.shutdown() the port not be free

[DspringL]

async def start_proxy(host: str = '0.0.0.0', port: int = 9090) -> Master:
opts = options.Options(listen_host=host, listen_port=port)
master = dump.DumpMaster(
opts,
with_termlog=True,
with_dumper=True,
)
master.addons.add(HttpHook())
await master.run()
return master

proxy_loop = asyncio.new_event_loop()
coro = start_proxy()
proxy_loop.run_until_complete(coro)
ctx.master.shutdown()

System Information

Mitmproxy: 10.3.0
Python: 3.11.9
OpenSSL: OpenSSL 3.2.1 30 Jan 2024
Platform: macOS-13.5.2-arm64-arm-64bit

[DspringL]

The shutdown() port has not been released, expected the port to be released