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Heatmap: Cells displaying blanks - tooltip shows data exists #3837

SamProtas opened this issue Feb 17, 2015 · 1 comment


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commented Feb 17, 2015

I have a 16 X 16 heatmap that's been working properly for well over a month. I noticed today there is a display issue where roughly half of the cells are shown blank.

The provided tooltips indicate the data is being properly received and understood by highcharts.js/heatmap.js so I believe this is a rendering issue.

I only noticed the issue today but it may have been introduced in the 2015-02-16 or 2015-02-17 changes. I have confirmed that this issue appeared on a dataset that has not changed between when this solution worked and when the display issue was introduced.


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commented Feb 18, 2015

It's the new feature, dataLabels.allowOverlap. You can set it to true to go back to how it was:

But the algorithm also seems to be too agressive when detecting overlap in this case, so we'll mark it a bug.

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