Updating the tooltip.pointFormat does not work

[pawellysy]

Expected behaviour

The pointFormat should update.

Actual behaviour

The tooltip.pointFormat does not update, when is defined in chart.update()

Live demo with steps to reproduce

https://jsfiddle.net/BlackLabel/zd7t1xgL/

Product version

v10.3.3

Workaround

Define the empty tooltip object in configuration.
https://jsfiddle.net/BlackLabel/9b1p5vkn/617/

Affected browser(s)