Item chart update not working properly

[LB0ge]

Expected behaviour

Item chart update should work (ref. Item chart docs)

Actual behaviour

Update not working properly. For example, in the doc demo above, try switching between Britain and Norway. Series markers are "stuck" when updating. Also, see demo links below.

Live demo with steps to reproduce

Demo - working (v10.2.1): https://jsfiddle.net/BlackLabel/z6yo2x1q/ ✅
Demo - not working (v10.3.0): https://jsfiddle.net/BlackLabel/6eg859p0/ ❌

Product version

Highcharts Core, v.10.3.0
Probable culprit: looking at the changelog, there is a bugfix #17315 related to item series markers.

Affected browser(s)

All

[bm64]

Workaround:
Set chart.allowMutatingData property to false
Demo: https://jsfiddle.net/BlackLabel/j4qcthzn/
https://jsfiddle.net/BlackLabel/fcq0uhgw/