Chart serialization exception

I am still playing with the recently released version of protobuf-net, and I ran into a problem that I do not understand.

consider the code snippet below:

    [ProtoContract]
    class Node
    {
        public Node()
        {
            Children = new List<Node>();
        }

        [ProtoMember(1, IsRequired = true)]
        public int Data { get; set; }

        [ProtoMember(2, IsRequired = true, AsReference = true)]
        public List<Node> Children { get; set; }

        public void AddChild(Node child)
        {
            Children.Add(child);
        }
    }

    static void Main()
    {
        Node n = new Node {Data = 0}, root = n;
        for (int i=1; i<15; i++)
        {
            Node child = new Node {Data = i};
            n.AddChild(child);
            n = child;
        }
        Node clone = Serializer.DeepClone(root);
    }

It throws a type exception ProtoExceptionwith the message "Possible recursion detected ..."

The funny thing is that if I remove the attribute AsReferencein the property Children, it’s not! Unfortunately, the lines above are just written to illustrate the problem, and I need this attribute for the real structure that I use.

So my question is ... is this a known issue, and is there any patch that is planned to be fixed very soon? Or does anyone know of a workaround?

thank