Stack labels' `verticalAlign` doesn't work for logarithmic yAxis.

[ddragula]

Expected behaviour

Setting stackLabels.verticalAlign in the logarithmic axis to any value works as in the regular axis.

Actual behaviour

Setting stackLabels.verticalAlign in the logarithmic axis to bottom or middle makes the labels invisible.

Live demo with steps to reproduce

https://jsfiddle.net/BlackLabel/fntvzh31/

Product version

Highcharts v10.3.3

[NathanManning]

Please make sure it works with the original data layout as well.

broken: https://jsfiddle.net/o0L9wmhu/
working: https://jsfiddle.net/m9touxh8/1/

[hubertkozik]

Hi guys! There is a problem with calculating the 0 value to pixels on logarithmic axes - I will fix in HC Core. Now, I have a workaround for that issue, which overrides an HC method. You can check the demo below (the plugin is inside the IIFE function). A similar solution will be used in HC Core.

Workaround demos: https://jsfiddle.net/BlackLabel/w8ck6osf/
https://jsfiddle.net/BlackLabel/m5zpf0wh/