Request.is_disconnected() fails after adding Middleware

[weditor]

I use request.is_disconnected() to detect client disconnects:

async def homepage(request):
    while True:
        disconnected = await request.is_disconnected()
        if disconnected:
            print("disconnected!")
            return JSONResponse({"msg": "this is an invalid response"})
        print("hello...")
        await asyncio.sleep(1)
app = Starlette(routes=[Route("/", homepage)])

It works well. but, after i add an middleware, is_disconnected always return False:

... ...
+ class MyMiddleware(BaseHTTPMiddleware):
+     async def dispatch(self, request, call_next):
+         return await call_next(request)
+ middleware = [Middleware(MyMiddleware)]
... ...
- app = Starlette(routes=[Route("/", homepage)])
+ app = Starlette(routes=[Route("/", homepage)], middleware=middleware)

is there something wrong?

[weditor]

sorry, duplicated , #2094