Apexchart color_threshold looks really odd

I have a soil sensor that gives humidity and temperature, and I would like a nice graph with the values.
This config for apexchart will show the graphs:

type: custom:apexcharts-card
header:
  show: true
  standard_format: false
  title: Jordsensor
  colorize_states: true
  show_states: true
graph_span: 1d
all_series_config:
  stroke_width: 2
  type: line
yaxis:
  - id: moisture
    min: 0
    max: 100
    apex_config:
      tickAmount: 5
  - id: temperature
    min: -10
    max: 50
    opposite: true
    apex_config:
      tickAmount: 6
apex_config:
  dataLabels:
    enabled: true
    dropShadow:
      enabled: true
series:
  - entity: sensor.soil_sensor_soil_moisture
    curve: smooth
    name: Jordfugtighed
    group_by:
      duration: 30m
      func: avg
    yaxis_id: moisture
  - entity: sensor.soil_sensor_temperature
    curve: smooth
    name: Jordtemperator
    group_by:
      duration: 15m
      func: avg
    yaxis_id: temperature

billede

But of course, I want more, so I tried adding color_threshold (the thresholds are not set appropriately yet):

type: custom:apexcharts-card
experimental:
  color_threshold: true
header:
  show: true
  standard_format: false
  title: Jordsensor
  colorize_states: true
  show_states: true
graph_span: 2d
all_series_config:
  stroke_width: 2
  type: line
yaxis:
  - id: moisture
    min: 0
    max: 100
    apex_config:
      tickAmount: 5
  - id: temperature
    min: -10
    max: 50
    opposite: true
    apex_config:
      tickAmount: 6
apex_config:
  dataLabels:
    enabled: true
    dropShadow:
      enabled: true
series:
  - entity: sensor.soil_sensor_soil_moisture
    curve: smooth
    name: Jordfugtighed
    group_by:
      duration: 1h
      func: avg
    yaxis_id: moisture
    color_threshold:
      - value: 0
        color: iceblue
      - value: 20
        color: midnightblue
      - value: 40
        color: green
      - value: 60
        color: orange
      - value: 80
        color: red
    show:
      header_color_threshold: true
  - entity: sensor.soil_sensor_temperature
    curve: smooth
    name: Jordtemperator
    group_by:
      duration: 1h
      func: avg
    yaxis_id: temperature
    show:
      header_color_threshold: true
    color_threshold:
      - value: -10
        color: blue
      - value: 0
        color: blue
      - value: 25
        color: glue
      - value: 30
        color: blue
      - value: 35
        color: blue

Which gives me this, rather odd graph, where only ONE of the intervarls are drawn on the graph?
billede

I know the threshold is experimental, but shouldn┬Ęt this work?