There will be no exception when the Mqtt client is disconnected from the network

[xuzimianxzm]

🐛 Bug Report

There will be no exception when the Mqtt client is disconnected from the network. When I use HiveMQClient to connect to the Mqtt server, I disconnect the network of the Mqtt server or shut down the mqtt server. At this time, my HiveMQClient will not actively throw any exceptions or information. Including when I try to subscribe to the OnDisconnectReceived event of HiveMQClient, it will not be triggered. Even if I restore the Mqtt server, HiveMQClient will reconnect, but the OnDisconnectReceived event will never be triggered.

I hope that when there is a problem with the network and it cannot connect to Mqtt, there should be an event prompt or an exception thrown, so that my program can actively handle such events. I don't know what you think of this suggestion

🔬 How To Reproduce

Steps to reproduce the behavior:

1. ...

Code sample

public static class Test
{
    public static async void main()
    {
        var options = new HiveMQClientOptionsBuilder()
            .WithBroker(ip address)
            .WithPort(8883)
            .WithClientId($"{DateTime.Now.Ticks}")
            .WithAutomaticReconnect(true)
            .WithUseTls(true)
            .WithAllowInvalidBrokerCertificates(true)
            .Build();
        var client = new HiveMQClient(options);

        var connectResult = client.ConnectAsync().ConfigureAwait(false).GetAwaiter().GetResult();

       
        if (connectResult.ReasonCode != ConnAckReasonCode.Success)
        {
            throw new Exception("Mqtt Server Connect Failed");
        }


        client.OnDisconnectReceived += clientOnDisconnectReceived;
        client.OnDisconnectSent += OnDisconnectSent;

        await WaitNoStop();
    }

    private static void OnDisconnectSent(object? sender, OnDisconnectSentEventArgs e)
    {
        Console.WriteLine("---Disconnect event 2----");
    }

    private static void clientOnDisconnectReceived(object? sender, OnDisconnectReceivedEventArgs e)
    {
        Console.WriteLine("---Disconnect event 1----");
    }

    public static async Task WaitNoStop()
    {
        while (true)
        {
            Thread.Sleep(3000); // 休眠1秒  
            Console.WriteLine("------------");
        }
    }

[xuzimianxzm]

AfterDisconnect Event can process the mqtt server down