Can`t support Server-Sent Event?

[lknbv5]

public async Task TimeSSE(CancellationToken cancellationToken)
{
    Response.Headers.Add("Content-Type", "text/event-stream;charset=utf-8");
    Response.Headers.Add("Cache-Control", "no-cache");
    Response.Headers.Add("Connection", "keep-alive");
    try
    {
        while (!cancellationToken.IsCancellationRequested)
        {
            Debug.WriteLine("输出中");
            await Response.WriteAsync("event:test\n");
            await Response.WriteAsync("data:" + DateTime.Now.ToLongTimeString() + "\n");
            await Response.WriteAsync("retry: 1000\n\n");
            await Response.Body.FlushAsync(); // 刷新缓冲区，立即发送数据到客户端
            await Task.Delay(1000); // 等待1秒后再次发送
        }
    }
    catch (OperationCanceledException)
    {

    }
}

I have an SSE interface, but after using WatchDog, the client can't get the Event in time, I tried to add this route address in the blacklist to eliminate the effect, but it still doesn't work!

Is this a bug, or is there another way to handle this?

[github-actions]

This issue is stale because it has been open for 30 days with no activity.

[github-actions]

This issue was closed because it has been inactive for 14 days since being marked as stale.