Exception somewhere in the httpx/httpcore entrails

Question

I've a scraping engine which uses any proxy list, and retries in case the proxy doesn't work. So there are plenty of proxies that timeout, have connection refused, bad certificates etc. After I switched to httpx from aiohttp I have plenty of internal exceptions that don't seem to hinder, just spam the log.

16:47:37: Future exception was never retrieved
future: <Future finished exception=BrokenResourceError()>
Traceback (most recent call last):
  File "/usr/lib/python3.9/asyncio/selector_events.py", line 856, in _read_ready__data_received
    data = self._sock.recv(self.max_size)
ConnectionResetError: [Errno 104] Connection reset by peer

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/home/pooh/venv39/lib/python3.9/site-packages/httpcore/_backends/anyio.py", line 60, in read
    return await self.stream.receive(n)
  File "/home/pooh/venv39/lib/python3.9/site-packages/anyio/_backends/_asyncio.py", line 1095, in receive
    raise self._protocol.exception
anyio.BrokenResourceError

Maybe someone from the developers can shed a light at what it is?