CORSMiddleware is sending an extra 'http.response.body' about starlette HOT 3 CLOSED

async def send(self, message, send=None, origin=None):
    if message["type"] == "http.response.start":

        message.setdefault("headers", [])
        headers = MutableHeaders(message["headers"])

        # If we only allow specific origins, then we have to mirror back
        # the Origin header in the response.
        if not self.allow_all_origins and origin in self.allow_origins:
            headers["Access-Control-Allow-Origin"] = origin
        headers.update(self.simple_headers)

    await send(message)