Drillup showing extra null columns when there are too many values

[laclelab]

Hi, I am working column chart drilldown, when there are around 50 columns in the same chart, everything is ok, but when there are more columns, it seems to be problem when drilldown then drillup again, please see my jsfiddle sample
http://jsfiddle.net/xwoe390r/
after drillup, the chart show extra column name like 204,200,196..., instead of the name.
If we hide/show category, it is normal again
I did google for this, but no luck, thank you.

[dominik.c]

Hello laclelab!

Welcome to our forum and thanks for contacting us with your question!

It looks like some kind of bug. You can report it on our GitHub if you think that too.
Link: https://github.com/highcharts/highchart ... new/choose

To solve this issue, we can use drillup event and call redraw method inside it.

API references:
https://api.highcharts.com/highcharts/c ... ts.drillup

Demo:
http://jsfiddle.net/BlackLabel/o5yqbpm3/

Best regards!