score:1

Accepted answer

Here: http://jsfiddle.net/BlackLabel/e9Lp3xvu/ I have reproduced the issue without Angular.

The problem is caused by the default value of tickPixelInterval for y-axis (72). As a solution you can reduce the value.

    yAxis: {
        visible: false,
        tickPixelInterval: 1
    },

Live demo: http://jsfiddle.net/BlackLabel/ozLbs8qy/

API Reference: https://api.highcharts.com/highcharts/yAxis.tickPixelInterval


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