Division when joining a vertical stack-in-card with a horizontal stack-in-card

[McGiverGim]

Checklist:

• [X] I updated to the latest version available
• [X] I cleared the cache of my browser

Release with the issue: 0.1.0

Last working release (if known): Unknown

Browser and Operating System:

• Chrome and Windows 10
• Android and official Home Assistant app

Description of problem: When adding an horizontal stack-in-card inside a vertical stack-in-card, the vertical division appears:

Sample of the yaml card of the image:

type: 'custom:stack-in-card'
cards:
  - type: 'custom:stack-in-card'
    mode: horizontal
    cards:
      - type: sensor
        entity: sensor.boton_de_alarma_battery
        graph: line
      - type: sensor
        entity: sensor.boton_de_alarma_battery
        graph: line
  - type: sensor
    entity: sensor.boton_de_alarma_battery
    graph: line

Javascript errors shown in the web inspector (if applicable): None

Additional information:

• I have played with the keep settings without luck.
• I can replace the horizontal stack-in-card by a standard horizontal-stack, but I want to play with the keep settings inside the horizontal stack (I want to add a margin and a shadow to the horizontal stack but not to the vertical stack).

[jenniferlee1818]

I have this same thing happening with my horizontal stack within vertical stack.

[julienlarivee]

Same behavior here too.

[circa1665]

Same issue:

type: 'custom:stack-in-card'
mode: vertical
cards:
  - type: weather-forecast
    entity: weather.openweathermap
  - type: 'custom:stack-in-card'
    mode: horizontal
    cards:
      - type: entities
        entities:
          - entity: sensor.nextsunrise
            type: 'custom:multiple-entity-row'
            show_state: false
            secondary_info:
              entity: sensor.nextsunrise
              name: false
      - type: entities
        entities:
          - entity: sensor.nextsunset
            type: 'custom:multiple-entity-row'
            show_state: false
            secondary_info:
              entity: sensor.nextsunset
              name: false
  - type: conditional
    conditions:
      - entity: sun.sun
        state: above_horizon
    card:
      type: entities
      entities:
        - entity: sensor.current_uv_level
        - entity: sensor.skin_type_2_safe_exposure_time
          name: Safe exposure time
        - entity: sensor.uv_protection_template
          name: Protection