Chart added using Chart.JS appears and disappears (HTML5 Canvas)

Hi all, I've tried to add a chart using Chart.JS in my HTML5 Canvas project. The chart does appear for 1-2 seconds but then disappears again. It becomes visible again when you hover the mouse over the area where the chart should be as you can see in the below picture. 

The chart.js library was loaded via a CDN link under global include and the code that I used for creating the chart on the frame is:

var _this = this;
this.stop();

MyContainer = new createjs.Container(); 
stage.addChild(MyContainer);

const chartCanvas = document.getElementById("canvas");
const canvasContext = chartCanvas.getContext("2d");
const chartBitmap = new createjs.Bitmap(chartCanvas);

var myChart = new Chart(canvasContext, {
  type: 'bar',
  data: {
    labels: ["2015-01", "2015-02", "2015-03", "2015-04", "2015-05", "2015-06", "2015-07", "2015-08", "2015-09", "2015-10", "2015-11", "2015-12"],
    datasets: [{
      label: '# of Tomatoes',
      data: [12, 19, 3, 5, 2, 3, 20, 3, 5, 6, 2, 1],
      backgroundColor: [
        'rgba(255, 99, 132, 0.2)',
        'rgba(54, 162, 235, 0.2)',
        'rgba(255, 206, 86, 0.2)',
        'rgba(75, 192, 192, 0.2)',
        'rgba(153, 102, 255, 0.2)',
        'rgba(255, 159, 64, 0.2)',
        'rgba(255, 99, 132, 0.2)',
        'rgba(54, 162, 235, 0.2)',
        'rgba(255, 206, 86, 0.2)',
        'rgba(75, 192, 192, 0.2)',
        'rgba(153, 102, 255, 0.2)',
        'rgba(255, 159, 64, 0.2)'
      ],
      borderColor: [
        'rgba(255,99,132,1)',
        'rgba(54, 162, 235, 1)',
        'rgba(255, 206, 86, 1)',
        'rgba(75, 192, 192, 1)',
        'rgba(153, 102, 255, 1)',
        'rgba(255, 159, 64, 1)',
        'rgba(255,99,132,1)',
        'rgba(54, 162, 235, 1)',
        'rgba(255, 206, 86, 1)',
        'rgba(75, 192, 192, 1)',
        'rgba(153, 102, 255, 1)',
        'rgba(255, 159, 64, 1)'
      ],
      borderWidth: 1
    }]
  },
  options: {
    responsive: false,
    scales: {
      xAxes: [{
        ticks: {
          maxRotation: 90,
          minRotation: 80
        }
      }],
      yAxes: [{
        ticks: {
          beginAtZero: true
        }
      }]
    }
  }
});

MyContainer.addChild(chartBitmap);
MyContainer.update();

Any idea what could cause this and how to resolve this issue? Any suggestions or help would be great ly appreciated!

Thanks!