Location based notification driving me mad

Configuration
1

This is driving me mad. I want a notification to trigger when someone comes home, and the other person is out. Can anyone help me please?

- id: information2
   alias: tell_a_that_b_is_home
   hide_entity: true
   trigger:
    platform: state
    entity_id: device_tracker.b
    from: 'not_home'
    to: 'home'
   condition:
    condition: state
    entity_id: device_tracker.a
    state: 'not_home'
   action:
    - service: notify.a
      data:
       message: 'A has arrived home safely'

The notification works as when I fire a test trigger I receive it, so it must be something to do with my logic.

I’ve tried setting the states in the UI to test, and no notification.

All and any help appreciated.

2

It is Friday and it is late. And I seem to have had a brain fart. Just retested it, and it works.

Looks like I had to reload HA entirely, not just reload automations.