Piechart series shadow is not applied on update

[Leonidas51]

Expected behaviour

When using chart.update to update series, new shadow should be applied to them from the options argument (if present).

Actual behaviour

Shadow is not applied.

Live demo with steps to reproduce

https://codepen.io/ElStaino/pen/NWyRjvm?editors=1011
Click on 'Update Chart' button.

Product version

Highcharts JS v10.1.0

Affected browser(s)

Google Chrome Version 100.0.4896.88 (Official Build) (x86_64)

[pawellysy]

Hello @Leonidas51, thanks for reporting this bug!
Simplified demo: https://jsfiddle.net/BlackLabel/g6xmskrd/

[raf18seb]

It's because shadowGroup is not preserved.

Workaround and a potential fix: preserve shadowGroup, line 30: https://jsfiddle.net/BlackLabel/vpLnh3w2/