Bridge keeps periodically crashing

[neutralinsomniac]

Three times now over the past 12 hours I've encountered the following stacktrace, causing the Telegram->Matrix side of message forwarding to stop working:

ERROR:asyncio:Task exception was never retrieved
future: <Task finished coro=<Bot.loop() done, defined at /home/jeremy/telematrix/venv/lib/python3.5/site-packages/aiotg/bot.py:57> exception=ClientResponseError()>
Traceback (most recent call last):
  File "/home/jeremy/telematrix/venv/lib/python3.5/site-packages/aiohttp/client.py", line 202, in _request
    yield from resp.start(conn, read_until_eof)
  File "/home/jeremy/telematrix/venv/lib/python3.5/site-packages/aiohttp/client_reqrep.py", line 640, in start
    message = yield from httpstream.read()
  File "/home/jeremy/telematrix/venv/lib/python3.5/site-packages/aiohttp/streams.py", line 641, in read
    result = yield from super().read()
  File "/home/jeremy/telematrix/venv/lib/python3.5/site-packages/aiohttp/streams.py", line 476, in read
    yield from self._waiter
  File "/usr/lib/python3.5/asyncio/futures.py", line 361, in __iter__
    yield self  # This tells Task to wait for completion.
  File "/usr/lib/python3.5/asyncio/tasks.py", line 296, in _wakeup
    future.result()
  File "/usr/lib/python3.5/asyncio/futures.py", line 274, in result
    raise self._exception
aiohttp.errors.ServerDisconnectedError

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

Traceback (most recent call last):
  File "/usr/lib/python3.5/asyncio/tasks.py", line 241, in _step
    result = coro.throw(exc)
  File "/home/jeremy/telematrix/venv/lib/python3.5/site-packages/aiotg/bot.py", line 76, in loop
    timeout=self.api_timeout
  File "/home/jeremy/telematrix/venv/lib/python3.5/site-packages/aiotg/bot.py", line 205, in api_call
    response = await aiohttp.post(url, data=params)
  File "/home/jeremy/telematrix/venv/lib/python3.5/site-packages/aiohttp/client.py", line 613, in __await__
    return (yield from self._coro)
  File "/home/jeremy/telematrix/venv/lib/python3.5/site-packages/aiohttp/client.py", line 209, in _request
    raise aiohttp.ClientResponseError() from exc
aiohttp.errors.ClientResponseError