如果数据集具有空值，则Highcharts arearange图表填充backgroudn将关闭

Question

在以前工作之前，如果连接的数据集中的空值不是空值，则显示连续的最小/最大行数。但是，它似乎在最近的高图发布中不起作用 - 请参阅此处的问题http://jsfiddle.net/ryaa/c93bbqpt/2/

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$(function () {

    var ranges = [
            [1246406400000, 14.3, 27.7],
            [1246492800000, 14.5, 27.8],
            [1246579200000, null, null],
            [1246665600000, null, null],
            [1246752000000, 16.5, 25.0],
            [1246838400000, 17.8, 25.7],
            [1246924800000, 13.5, 24.8],
            [1247011200000, 10.5, 21.4],
            [1247097600000, 9.2, 23.8],
            [1247184000000, 11.6, 21.8],
            [1247270400000, 10.7, 23.7],
            [1247356800000, 11.0, 23.3],
            [1247443200000, 11.6, 23.7],
            [1247529600000, 11.8, 20.7],
            [1247616000000, 12.6, 22.4],
            [1247702400000, 13.6, 19.6],
            [1247788800000, 11.4, 22.6],
            [1247875200000, 13.2, 25.0],
            [1247961600000, 14.2, 21.6],
            [1248048000000, 13.1, 17.1],
            [1248134400000, 12.2, 15.5],
            [1248220800000, 12.0, 20.8],
            [1248307200000, 12.0, 17.1],
            [1248393600000, 12.7, 18.3],
            [1248480000000, 12.4, 19.4],
            [1248566400000, 12.6, 19.9],
            [1248652800000, 11.9, 20.2],
            [1248739200000, 11.0, 19.3],
            [1248825600000, 10.8, 17.8],
            [1248912000000, 11.8, 18.5],
            [1248998400000, 10.8, 16.1]
        ],
        averages = [
            [1246406400000, 21.5],
            [1246492800000, 22.1],
            [1246579200000, null],
            [1246665600000, null],
            [1246752000000, 21.4],
            [1246838400000, 21.3],
            [1246924800000, 18.3],
            [1247011200000, 15.4],
            [1247097600000, 16.4],
            [1247184000000, 17.7],
            [1247270400000, 17.5],
            [1247356800000, 17.6],
            [1247443200000, 17.7],
            [1247529600000, 16.8],
            [1247616000000, 17.7],
            [1247702400000, 16.3],
            [1247788800000, 17.8],
            [1247875200000, 18.1],
            [1247961600000, 17.2],
            [1248048000000, 14.4],
            [1248134400000, 13.7],
            [1248220800000, 15.7],
            [1248307200000, 14.6],
            [1248393600000, 15.3],
            [1248480000000, 15.3],
            [1248566400000, 15.8],
            [1248652800000, 15.2],
            [1248739200000, 14.8],
            [1248825600000, 14.4],
            [1248912000000, 15],
            [1248998400000, 13.6]
        ];


    Highcharts.chart('container', {

        title: {
            text: 'July temperatures'
        },

        xAxis: {
            type: 'datetime'
        },

        yAxis: {
            title: {
                text: null
            }
        },

        tooltip: {
            crosshairs: true,
            shared: true,
            valueSuffix: '°C'
        },

        legend: {
        },

        series: [{
            name: 'Temperature',
            data: averages,
            zIndex: 1,
            marker: {
                fillColor: 'white',
                lineWidth: 2,
                lineColor: Highcharts.getOptions().colors[0]
            },
            connectNulls: true
        }, {
            name: 'Range',
            data: ranges,
            type: 'arearange',
            lineWidth: 0,
            linkedTo: ':previous',
            color: Highcharts.getOptions().colors[0],
            fillOpacity: 0.3,
            zIndex: 0,
            connectNulls: true
        }]
    });
});

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<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://code.highcharts.com/highcharts.js"></script>
<script src="https://code.highcharts.com/highcharts-more.js"></script>
<script src="https://code.highcharts.com/modules/exporting.js"></script>

<div id="container" style="min-width: 310px; height: 400px; margin: 0 auto"></div>

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有没有人知道如何处理这个问题？