Calendar doesn't get updated in kiosk mode

Configuration Frontend
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1

Hi, I’m pretty new with HA. I run currently HA on a raspberry PI (fullpageos version) in a kiosk mode. The calendar in the “calendar card” does’t get updated in the night. Does someone has a hint how to fix that?

cards:
      - initial_view: listWeek
        type: calendar
        entities:
          - calendar.together