Restrict the dragging/movement of smart lines in fusioncharts to avoid weird shapes - fusioncharts

I'm creating doughnut chart with smart lines and labels. When there is only one item in the chart, I'm facing an issue. If you drag the smart label or line around, the chart changes its shape in some angles. When the doughnut chart has 3-4 items this doesn't occur. I have attached screenshots. Is there any way to fix this or disable the rotation of chart when lines/labels are dragged?

To restrict the dragging of smartlines, add "enableRotation": "0" to the chart object. Here's the updated fiddle http://jsfiddle.net/g1254w67/19/

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