settings.facets is undefined with @FacetsWidget plugin

Problem/Motivation

I setup facets Slider, RangeSlider and Drowdown.
All widget plugin add drupalSettings inside the build function.

$build['#attached']['drupalSettings']['facets']...

but no settings.facets is available inside js.
Something wrong to attach settings with WidgetPluginBase
I try with facets 2.0.9 without patchs.

Steps to reproduce

Enable slider widget