addSeries() combined with boost.js throws console errors.

[Denyllon]

Actual behaviour

While using addSeries() combined with boost.js module there are errors throwed in console, and one of added series isn't visible.

Might be related to 7309

Live demo with steps to reproduce

https://jsfiddle.net/daniel_s/vgoq9f4r/

Occurence

v6.0.0 and above

[KacperMadej]

@cvasseng

[TorsteinHonsi]

First of all, I don't know if it resolves the actual use case, but the demo doesn't adhere to best practice. In stead of removing the two series, setting new data to the option set and add new series, it is recommended to use Series.setData. This also resolves the issue with the console error: https://jsfiddle.net/highcharts/vgoq9f4r/1/.

[TorsteinHonsi]

Simplified demo

https://jsfiddle.net/highcharts/vgoq9f4r/2/

[TorsteinHonsi]

Debugging so far points to the shouldForceChartSeriesBoosting function. If first returns false as expected, but when adding the second series it returns true, which is not expected as we only have two series each with four points in the chart. Will discuss this with @cvasseng.