amqpnetlite link.Accept(msg) not dequeuing

Question

I am using AMQPNetLite to send and receive AMQP messages from ActiveMQ brokers. I am new to this and would like to understand what I am doing wrong. I am following the example from the documentation as below.

        var _receiverLink = new ReceiverLink(session, "Name", "QName");
        _receiverLink.Start(10, (link, m) =>
        {
            link.Accept(m);
        });

I am successfully receiving the message but using of

link.Accept(m);

does NOT remove the message from the queue. Can anyone please guide me what I am missing.

Edit: It works when I add a delay. The message is removed from the Queue.

Thread.Sleep(1000);
link.Accept(msg);