Single app update in multiple app repository triggers sync event on all apps

[gdznela]

I have multiple apps (helm) deployed via app of apps pattern, all residing in folders in same git repository:
app1, app2, app3... appN.
I have configured trigger for on-deployed event (from example in helm chart):

    trigger.on-deployed: |
      - description: Application is synced and healthy. Triggered once per commit.
        oncePer: app.status.sync.revision
        send:
        - app-deployed
        when: app.status.operationState.phase in ['Succeeded'] and app.status.health.status == 'Healthy'

and default subsciption:

  subscriptions:
    - recipients:
      - slack:release
      triggers:
      - on-deployed

Now if I change file(s) in app1 folder, trigger is firing on all other apps as well: app2, app3 ... appN, spamming slack with unneeded messages about apps that are not affected by change and are not actually deployed.
I want to be notified only about apps that are actually updated/deployed. Is there any workaround to achieve this?