Update Entity

Hello,
i have created a Alarmo alarm system.
now i want to arm and/or disarm the alarm system when my cell phone is out of the network Wifi range.
i create an automation for it but it doesn’t work.
it should disarm the alarm after 15 seconds but it will cost more then 2 minutes before the alarm is disarmed.
is there something wrong in the automation

type or paste code here
```- id: '1662455941966'
  alias: HA_Update OPPO van Wil
  description: HA_Update OPPO van Wil
  trigger:
  - platform: time_pattern
    seconds: /15
  condition: []
  action:
  - service: homeassistant.update_entity
    data: {}
    target:
      entity_id: device_tracker.wil_s_oppo
  mode: single
- id: '1662486590757'
  alias: Arm alarm when Away
  description: ''
  trigger:
  - platform: state
    entity_id:
    - device_tracker.wil_s_oppo
    to: not_home
    from: home
  condition: []
  action:
  - service: alarmo.arm
    data:
      entity_id: alarm_control_panel.alarmo
      code: 'secret'
      mode: away
  mode: single
- id: '1662488515899'
  alias: Disarm alarm when Home
  description: ''
  trigger:
  - platform: state
    entity_id:
    - device_tracker.wil_s_oppo
    to: home
    from: not_home
  condition: []
  action:
  - service: alarm_control_panel.alarm_disarm
    data:
      code: 'secret'
    target:
      entity_id: alarm_control_panel.alarmo
  mode: single

anybody any idea?