Camera / picture-glance image (loaded from a URL) doesn't change?

I’m using picture-glance cards to show changing images hosted on the www. The sensors which inform the image placeholders, e.g. camera.radio2, look like this in my config. The URLs refresh correctly throughout the day as the images change on the web, but unless I refresh the home assistant webpage, the ‘cameras’ never update the picture shown to me. Any way I can modify that?

  - platform: generic
    name: Radio2
    still_image_url: "{{states.sensor.radio2_url.state|replace('400x400','288x288')}}"
    limit_refetch_to_url_change: true
   cards:
      - camera_image: camera.radio1
        camera_view: live
        entities:
          - automation.forked_demand
        type: picture-glance
      - entities:
          - entity: sensor.friendly_r1_status
        show_icon: false
        show_name: false
        show_state: true
        type: glance
      - camera_image: camera.radio2
        camera_view: live
        entities:
          - automation.forked_demand
        type: picture-glance
      - entities:
          - entity: sensor.friendly_r2_status
        show_icon: false
        show_name: false
        show_state: true
        type: glance
      - camera_image: camera.radio3
        camera_view: live
        entities:
          - automation.forked_demand
        type: picture-glance
      - entities:
          - entity: sensor.friendly_r3_status
        show_icon: false
        show_name: false
        show_state: true
        type: glance
      - camera_image: camera.radio4
        camera_view: live
        entities:
          - automation.forked_demand
        type: picture-glance
      - entities:
          - entity: sensor.friendly_r4_status
        show_icon: false
        show_name: false
        show_state: true
        type: glance
      - camera_image: camera.radio4extra
        camera_view: live
        entities:
          - automation.forked_demand
        type: picture-glance
      - entities:
          - entity: sensor.friendly_r4extra_status
        show_icon: false
        show_name: false
        show_state: true
        type: glance
      - camera_image: camera.radio6
        camera_view: live
        entities:
          - automation.forked_demand
        tap_action:
          action: call-service
          service: automation.trigger
          service_data:
            entity_id: automation.alert
        type: picture-glance
    icon: ''
    layout: vertical
    column_width: 100%
    min_columns: 7
    path: radio
    title: Radio2
    type: 'custom:layout-card'