Accepted answer

The additional padding on y-axis is not added when you update axis extremes. As a solution change by 0.5 calculated extremes and disable properties: startOnTick, endOnTick.

    min: minValue - 0.5,
    max: maxValue + 0.5
}, true);

    yAxis: {
        startOnTick: false,
        endOnTick: false

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