HighCharts pie chart labels not displayed properly

Question

I have taken an example Highcharts plnkr and edited it to match my requirements. Below is the plnkr that I have developed. https://plnkr.co/edit/yzXLz7AIDoWa1Pzxxl4k?p=preview Here all the labels and icons for the labels are displayed properly. But when I include it in my application, the icons for the labels are not displayed properly. It is displayed as below

My label code is as below

 labelFormatter: function () {
                    return '<div class="legend-label-md row" style=" border-bottom:1px solid black; margin-bottom: 5px"><span class="col-md-10">' + this.name +
                    '</span><span class="col-md-2" >' + this.value +
                    '%</span></div> ';
            }