[Accessibility] Keyboard navigation breaks after updating series in heatmap

[magdalena-gut]

Expected behaviour

Keyboard navigation should work correctly after updating the series' data.

Actual behaviour

After the points are updated, the order of keyboard navigation is changed.

Demo and steps to reproduce

Initially, you can focus the first point and navigate with arrows to the next points.
But when the button is clicked (setData), the navigation order is changed.

https://jsfiddle.net/BlackLabel/jLxdg6h1/

Workaround

Set updatePoints parameter to false to replace points instead of updating them: https://jsfiddle.net/BlackLabel/6ypj8mbe/

Product version

Highcharts 9.3.2

[github-actions]

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