Mutliple Y axis scale error with brush

[paulocbranco]

Codepen

https://codepen.io/paulocbranco/pen/ewjeoj

Explanation

• What is the behavior you expect?
  I expect the first Y axis has the correct scale.
• What is happening instead?
  The first Y axis has the same scale as the second Y axis.
• What error message are you getting?
  None.

[junedchhipa]

The option chart.brush.autoScaleYaxis doesn't work well with multiple y-axis chart.
Hence, I suggest turning it off.

chart: {
    id: "brush",
    brush: { 
      target: "chart", 
      enabled: true, 
      autoScaleYaxis: false 
   }
}