Automation with zone condition not working as expected

Configuration
1

I want to turn on a light at a specified time every day, but only when I am at home. What happens is that the light turns on even when I am not at home.

alias: Test bedside light on
description: ""
triggers:
  - trigger: time
    at: "12:00:00"
conditions:
  - condition: zone
    entity_id: device_tracker.john_s_mobile
    zone: zone.home
actions:
  - type: turn_on
    device_id: 3ff9735c19bb2d478806c68369e74ecd
    entity_id: a9f743a6107b46a1d26bf805358d408d
    domain: switch
mode: single

Any ideas about what I am doing wrong?

2

Do you have remote access to Home Assistant?

3

No. Is that the problem?

4

Yes… when your phone leaves it can’t tell HA it has left

5

Thanks for your help.