As you know, each domain that you own has its own unique user base. And since the User Identification feature is account-based, if you have it enabled, every embedded container is expecting to receive user IDs to display your content to your end-users - for each of your domains.
If you have enabled User Identification and a user can’t view your live content, this might be because they haven’t been sent as an identified user. You can check this by opening the Troubleshooter > Current User > User Identification Completed x or ✅ .
See the image below: different containers are being used in different environments.
If you would like to learn more about enabling User Identification, check out this article! 🎉