Why I don't see the result of deduplication

Hello, please help me.

We set up sending events via facebook api.
But why I don’t see the result of deduplication on facebook?
You have a clear picture in your documentation. https://gtm-server.com/how-to-set-up-facebook-event-deduplication-in-google-tag-manager/

Events are transmitted, have the same event_id, but for some reason I don’t see deduplication

I would do these things:

  1. check that you are using the same Facebook pixel ID in the web and server container.
  2. make sure that you’ve enabled both web and server Google Tag Manager previews.
  3. Remove Facebook test ID in the server container and check if you’ll see only browser events. Maybe there are some limitation for sites built on Tilda

hello, thank you.
The problem was that I didn’t pass the parameter correctly in the web container.
It was:
fbq(‘track’, ‘PageView’, {eventID: ‘546464’})

Changed it to:
fbq(‘track’, ‘PageView’, {}, {eventID: ‘546464’})

And now I see that the event is duplicated

Is that correct ?

But In documentation has a different picture

This can happen when you forget to create a test session on the browser. If you still do not see the web events, clear all cookies and cache in your browser and try again.