Chartjs-Django chartjs multiple charts stacked

I suspect that the chart is not destroying when you are simply doing context.clearRect().

If you look here on the Chart.js website it says that you have to do myLineChart.destroy(); in order to destroy a specific instance.

If you don’t want to destroy it, I would assume that you can use myLineChart.stop(); which stops animating the chart and then use context.clearRect(). to clear the chart.