Click on legend causes problem in Brush chart

[Sumon-miazi]

When I click on one legend it causes a problem in my chart if I scroll brush chart. My chart becomes smaller and smaller and finally gone. I did not use any legend configuration. it's using the default configuration. I have no idea how to resolve this.

made a gif for better understanding.

[junedchhipa]

This is surely a bug, and I have tagged it.
For now, you can turn off autoScaling on brush by

options = {
  chart: {
    brush: {
      autoScaleYaxis: false
    }
  }
}