title: Rasa Timeout Issue
body: <p>When running Rasa (tried on versions 1.3.3, 1.3.7, 1.3.8) I encounter this timeout exception message almost every time I make a call. I am running a simple program that recognises when a user offers their age, and stores the age in a database through an action response:</p>
  
  <pre><code>Bot loaded. Type a message and press enter (use '/stop' to exit):
  Your input -&gt;  I am 24 years old
  2019-10-10 13:29:33 ERROR    asyncio  - Task exception was never retrieved
  future: &lt;Task finished coro=&lt;configure_app.&lt;locals&gt;.run_cmdline_io() done, defined at /Users/Kami/Documents/rasa/venv/lib/python3.7/site-packages/rasa/core/run.py:123&gt; exception=TimeoutError()&gt;
  Traceback (most recent call last):
    File "/Users/Kami/Documents/rasa/venv/lib/python3.7/site-packages/rasa/core/run.py", line 127, in run_cmdline_io
      server_url=constants.DEFAULT_SERVER_FORMAT.format("http", port)
    File "/Users/Kami/Documents/rasa/venv/lib/python3.7/site-packages/rasa/core/channels/console.py", line 138, in record_messages
      async for response in bot_responses:
    File "/Users/Kami/Documents/rasa/venv/lib/python3.7/site-packages/async_generator/_impl.py", line 366, in step
      return await ANextIter(self._it, start_fn, *args)
    File "/Users/Kami/Documents/rasa/venv/lib/python3.7/site-packages/async_generator/_impl.py", line 205, in throw
      return self._invoke(self._it.throw, type, value, traceback)
    File "/Users/Kami/Documents/rasa/venv/lib/python3.7/site-packages/async_generator/_impl.py", line 209, in _invoke
      result = fn(*args)
    File "/Users/Kami/Documents/rasa/venv/lib/python3.7/site-packages/rasa/core/channels/console.py", line 103, in send_message_receive_stream
      async for line in resp.content:
    File "/Users/Kami/Documents/rasa/venv/lib/python3.7/site-packages/aiohttp/streams.py", line 40, in __anext__
      rv = await self.read_func()
    File "/Users/Kami/Documents/rasa/venv/lib/python3.7/site-packages/aiohttp/streams.py", line 329, in readline
      await self._wait('readline')
    File "/Users/Kami/Documents/rasa/venv/lib/python3.7/site-packages/aiohttp/streams.py", line 297, in _wait
      await waiter
    File "/Users/Kami/Documents/rasa/venv/lib/python3.7/site-packages/aiohttp/helpers.py", line 585, in __exit__
      raise asyncio.TimeoutError from None
  concurrent.futures._base.TimeoutError
  Transport closed @ ('127.0.0.1', 63319) and exception experienced during error handling
  </code></pre>
  
  <p>Originally I thought this timeout was being caused by using large lookup tables for another part of my Rasa program, but for age recognition I am using a simple regex:</p>
  
  <pre><code>## regex:age
  - ^(0?[1-9]|[1-9][0-9]|[1][1-9][1-9])$
  </code></pre>
  
  <p>And even this also causes the timeout.</p>
  
  <p>Please help me solve this. I don't even need to avoid the timeout, I just want to know where I can catch/ignore this exception.</p>
  
  <p>Thanks!</p>