It looks like your site is hosted on WPEngine, which features built-in caching when logged out of the site.
This is a simple fix: You can contact WPEngine support and ask them to set up a few cache exclusions for the events & checkout page. Here’s a guide that has more information:
The support post ‘Issue with registration’ is closed to new replies.
Have a question about this support post? Create a new support post in our support forums and include a link to this existing support post so we can help you.
Support forum for Event Espresso 3 and Event Espresso 4.