NetChart link arrow is not worked well with link dashed

[71tsai]

Link arrow in NetChart map is not worked well with link dashed. What we expect is a link with dashed and arrow at the end of it. Was this a bug ?

code and result as below:

    var t = new NetChart({
        container: document.getElementById("demo"),
        area: { height: null },
        data: { url: "https://zoomcharts.com/dvsl/data/net-chart/friend-net.json" },
        navigation: { initialNodes: ["m-1"], mode: "focusnodes" },
        style: {
            nodeStyleFunction: nodeStyle,
            linkStyleFunction: linkStyle
        }
    });

    function nodeStyle(node) {
        node.label = node.data.name;
    }

    function linkStyle(link) {
        link.fillColor = "red";
        link.direction = "D";
        link.lineDash = [10,10,2,2];
        link.fromDecoration = "circle";
        link.toDecoration = "arrow";
    }
<img src="//forum-zoomcharts-com-images.s3-eu-west-1.amazonaws.com/original/2X/4/4b97f841a421117ee500eb13e7a6ddb4dffe0d82.png" width="597" height="286">