Skip trigger close after restart

The following automation gets executed every time HA restarts, even if the state hasn’t changed during the restart.
How do I prevent this?

alias: Notify when Nest is set to home
initial_state: True
hide_entity: False
trigger:
  platform: template
  value_template: "{{ is_state_attr('climate.living_room', 'away_mode', 'off') }}"
action:
  service: notify.pushbullet
  data: 
    title: 'Nest is set to home'
    message: ""