server busy with no error if i try to fetch /offer many times and immediately abort the operation

[el07694]

//somewhere for client offering
controller = new AbortController();
signal = controller.signal;
return fetch("/offer", {,.... ,signal})

//somewhere when i want to cancel the operation with a button click:
controller.abort();

Steps to reproduce:

1. run aiohttp/aiortc server
2. fetch /index.html from the browser
3. click the start button one time and immediately click the stop button one time
4. Repeat step 3 ~5 times
5. Refetch /index.html from the browser

Error fetching /index.html after this operation
There is no error in the server.
I cannot post the full example because it's too big.

I am trying something like:

	document.body.addEventListener("dblclick",async function(){
		for(var i=0;i<10;i++){
			$("#control_call_button").click();
			await sleep(2000);
			$("#stop_call_button").click();
			await sleep(2000);
		}
	})
//in the client I have ten requests to /offer but the server run async def offer less than ten times :(

After all connections are closed i can't reload the html page.

So when:

if request.transport is None or request.transport.is_closing(): is detected is there something i can do to clean the task, request or something simillar?