ApexCharts-Card: Cannot stack area graphs

Configuration Frontend
1

I am trying to create a stacked area graph, using the latest apexcharts-card.

The problem I experience is that the area graphs are plotted on top of each other, not stacked. All areas extend down to the bottom of the graph.

I use this code:

          - type: custom:apexcharts-card
            graph_span: 3h
            stacked: true
            series:
              - entity: sensor.electricity
                attribute: gfx-baseline
                name: ''
                type: area
                color: 'gray'
                opacity: 0.3
                stroke_width: 0
              - entity: sensor.electricity
                attribute: gfx-consumption
                name: ''
                type: area
                color: 'green'
                opacity: 0.3
                stroke_width: 0
              - entity: sensor.electricity
                attribute: gfx-red
                name: ''
                type: area
                color: 'red'
                opacity: 0.3
                stroke_width: 0

Isn’t it possible to stack area graphs?

3

try

apex_config:
  chart:
    stacked: true