Pushover notify, multiple devices, only 1 client gets the images

Configuration
1

hi, i am using pushover to send notifications with images
if i define multiple targets, they all receive the message, but only the first targets gets the images, the second targets only the text

is this an issue with the component?

  - service: notify.pushover
    data_template:
      target:
      - !secret notify_1
      - !secret notify_2
      title: "Deurbel"  
      message: "Er staat iemand aan de deur!"
      data:
        priority: 1
        attachment: !secret snapshot_buiten