CONNECT packet must have at least 7 bytes.

[zzhanxianzhi]

After connecting to the client, it frequently disconnects and prompts Error while processing CONNECT packet, CONNECT packet must have at least 7 bytes. My code
MqttServerOptionsBuilder mqttServerOptionsBuilder = new MqttServerOptionsBuilder();
mqttServerOptionsBuilder.WithDefaultEndpoint();
mqttServerOptionsBuilder.WithDefaultEndpointBoundIPAddress(IPAddress.Parse(MqttService.ip));
mqttServerOptionsBuilder.WithDefaultEndpointPort(MqttService.port);
//mqttServerOptionsBuilder.WithEncryptedEndpointPort(port);
mqttServerOptionsBuilder.WithPersistentSessions(MqttService.withPersistentSessions);
mqttServerOptionsBuilder.WithDefaultCommunicationTimeout(TimeSpan.FromMilliseconds(60000));

            mqttServerOptionsBuilder.WithKeepAlive();
            mqttServerOptionsBuilder.WithTcpKeepAliveTime(7200);
            mqttServerOptionsBuilder.WithTcpKeepAliveRetryCount(5);
            mqttServerOptionsBuilder.WithTcpKeepAliveInterval(60);

            mqttServerOptionsBuilder.WithConnectionBacklog(MqttService.MaxNum);                    
            MqttServerOptions mqttServerOptions = mqttServerOptionsBuilder.Build();
            var mqttFactory = new MqttFactory(new ConsoleLogger(channle));                     
            MqttService._MqttServer = mqttFactory.CreateMqttServer(mqttServerOptions);  

[gfoidl]

For reference: #1809 (same issue).