Bubble series bounded by z=0 causes points to disappear

[cebamps]

Expected behaviour

Points in bubble series with z = 0 should be handled as any other point when computing the range of z values used for rendering.

Actual behaviour

When plotting multiple bubble series, a series whose minimum z value is 0 causes the computation of the global z scale to fail. This results in points falling out of the range and not being plotted at all.

I believe the issue is in those lines: https://github.com/highcharts/highcharts/blob/v10.1.0/ts/Series/Bubble/BubbleSeries.ts#L469-L470 If the running zMin or zMax is 0, the running minimum/maximum is forgotten and replaced with the current series' minimum/maximum in the loop.

Live demo with steps to reproduce

https://jsfiddle.net/5ns2ozma/

Product version

Highcharts v10.1.0

Affected browser(s)

Firefox, Chrome

[pawellysy]

Hello, @cebamps thanks for reporting this bug as well as a great demo and thorough debugging.
You are right, the issue is connected to the lines you pinpointed.

Workaround

Overwrite the getRadii method to use pick instead of the logical OR operator: https://jsfiddle.net/BlackLabel/7doLnme8/2/