Not always take new photo

[luisrival]

I have the next script, but for some reason sometimes it don´t take a photo when it is executed and use the last time execution photo

`alias: Face Recognition Timbre
sequence:

• service: image_processing.scan
  data: {}
  target:
  entity_id: image_processing.face
• delay:
  hours: 0
  minutes: 0
  seconds: 2
  milliseconds: 0
• service: notify.mobile_app_androidluis
  data_template:
  message: >-
  {{state_attr('image_processing.face', 'faces').0.name }} fue detectado
  con un nivel de precición de {{state_attr('image_processing.face',
  'faces').0.confidence | round(1) }}
  data:
  image: /media/local/deepstack/snapshots/face_latest.jpg
• service: notify.mobile_app_iphone_luis
  data_template:
  message: >-
  {{state_attr('image_processing.face', 'faces').0.name }} fue detectado
  con un nivel de precición de
  {{state_attr('image_processing.face','faces').0.confidence | round(1) }}
  data:
  image: /media/local/deepstack/snapshots/face_latest.jpg
• service: notify.mobile_app_ipad_de_luisr
  data_template:
  message: >-
  {{state_attr('image_processing.face', 'faces').0.name }} fue detectado
  con un nivel de precición de
  {{state_attr('image_processing.face','faces').0.confidence | round(1) }}
  data:
  image: /media/local/deepstack/snapshots/face_latest.jpg
  mode: single`

This script is executed when my doorbell is press, so in theory every time it is a person