Regression in map drilldown - data labels should fade in

[TorsteinHonsi]

Expected behaviour

On drill down, data labels should fade in slowly after the chart has zoomed

Actual behaviour

Data labels appear abruptly before the chart has zoom-animated

Live demo with steps to reproduce

https://jsfiddle.net/gh/get/library/pure/highcharts/highcharts/tree/master/samples/maps/demo/map-drilldown/

Product version

A regression in v7.0.0. Worked as intended in v6.2.0.

[khlieng]

Did some poking. The opacity fading part of this broke in 7.1.0, because of inactiveOtherPoints, there is no fading in of data labels on drilldown for all series that are not inactiveOtherPoints. And the deferred part of it broke in 8.2.0 when defer was introduced and the setTimeout in drawDataLabels got removed.