Vertical-stack-in-card shows border after HomeAssistent update 2024.7

Hello,
after updating to HomeAssistent 2024.7 there are borders around all items like buttons. I have no idea why. Have anyone a idea how to fix this?

Thank you very much

image

type: custom:vertical-stack-in-card
title: Licht
cards:
  - square: false
    type: grid
    cards:
      - type: custom:mushroom-entity-card
        entity: light.knx_dg_licht_schalten_buro_decke_einaus
        name: Decke
        layout: vertical
        double_tap_action:
          action: none
        icon_color: yellow
        icon: mdi:ceiling-light
        tap_action:
          action: toggle
      - type: custom:mushroom-entity-card
        entity: switch.knx_dg_steckdose_schalten_buro_wandlinkbett_einaus
        name: Stehlampe
        icon: mdi:floor-lamp
        icon_color: yellow
        layout: vertical
        double_tap_action:
          action: none
        tap_action:
          action: toggle
      - type: custom:mushroom-entity-card
        entity: input_boolean.dg_buro_prasenzalarm
        name: Präsenz Alarm
        icon: mdi:alarm-light-outline
        icon_color: green
        layout: vertical
        double_tap_action:
          action: none
        tap_action:
          action: toggle
      - type: custom:mushroom-entity-card
        entity: light.dg_buro_zb_hue_lampe_pc_licht
        name: Hue Leuchte
        icon: mdi:alarm-light-outline
        icon_color: yellow
        layout: vertical
        double_tap_action:
          action: none
        tap_action:
          action: toggle

It’s not a proper solution, but I used card-mod to work around this problem by adding the following into each card in the stack. Obviously you’ll need to be running card-mod for this to work.

        card_mod:
          style: |
            ha-card {
              border: none;
            } ```