charts InitialSelection seems not working for Combo charts

[Stephan-Enoro]

For single series charts the InitialSelection works like a charrm:

BarChart:
charts.InitialSelection(
shouldPreserveSelectionOnDraw: true,
selectedDataConfig: [
charts.SeriesDatumConfig('Consumption', _month)
]),

OrdinalComboChart:
When I setup a ComboChart the InitialSelection is ignored.
(same "series name" charts.SeriesDatumConfig('Consumption', _month)