Thank you for reaching out and I am happy to assist you with this.
This depends on which settings you have enabled in the W3 Total Cache. I’ve tried to check the website, however, it’s in maintenance mode, and I am guessing that the W3 Total Cache is not enabled.
Can you please disable the settings one by one in Performance>general settings, save the settings and purge the cache after each setting is disabled, and see which one might be causing the issue? Please start with the Lazyload as this is the most obvious if it’s enabled of course.
If the Lazyload is causing the problem, it means that elementor is using some kind of lazyload for those pop-ups, and you should exclude this image from being lazyloaded by adding the URL in the Performance>User Experience>Exclude words: field. Make sure to save all settings and purge the cache once you add the image to the exclusion list.