One other thing that comes to mind are the new performance options in Divi:
Let me know, if disabling one of those options solves the problem for you.
In case those options have no effect on the Popup behavior, feel free to hit the "Help" button on the right side and send us a message with the URL to your website. I can have a quick look at the website and let you know what I could find out.
Have a great day! Philipp
Thanks for reaching out and sorry to hear about those problems. This behavior is typical for a jQuery error. It’s usually caused by some outdated components – can you check, if you have installed the latest version of WordPress (v5.8.1) and Divi (v4.10.8)?
If both are up-to-date, then you’re possibly using a child theme or a plugin that loads an older version of jQuery.
Maybe you have installed the "Enable jQuery Migrate Helper" plugin (if yes -> disable it)
Let me know if you could solve the problem with those details, or if you need further assistance.
Thanks, Philipp 🙂