GA4 - Double Counting because user_id tracking

Question

Since we implemented the user_id tracking, we have a double counting issue in GA4. Screenshot

I see that UA and GA4 are triggered twice in the network tab

I focus on GA4, one request is triggered without the user_id and user_properties, the second one is triggered with...

My issue is that my UA and GA4 tags are triggered only one time through my TMS. We observe a double counting since we implemented the user_id tracking.

We don't use GTM as TMS, but Piwik PRO. For UA, we used the Google Analytics template provided by Piwik (without user_id tracking). For GA4, we used the custom HTML and the gtag version:

<!-- Google tag (gtag.js) -->
<script async src="https://www.googletagmanager.com/gtag/js?id=G-XXXXXXX"></script>

<script>
 window.dataLayer = window.dataLayer || [];
  function gtag(){dataLayer.push(arguments);}
  gtag('js', new Date());

  gtag('config', 'G-XXXXXXX', { 
    'page_location': location.hostname + location.pathname + location.hash 
  }
      );

  // set user_id and user properties
  gtag('set', {'user_id': {{ DLV | User ID }}});
  gtag('set', {'user_properties': {
    'country': {{ DLV | Country }},
    'language': {{ DLV | Language }},
  }});
  
</script>

Would you have an idea why we have a double counting?

Many thanks for you help :)

I can confirm that the issue is linked to the user_id: on the page where we don't have the datalyer, we don't have the issue.

GA4 - Double Counting because user_id tracking

0 Answers0