Hello,
Sorry for the inconvenience caused. Sometimes when things are appearing fine under the page builder editor and not on the Site preview, it is mostly related to the Cache issue on the Site. So, if you have any sort of Cache plugin enabled then once try completely clearing out Cache through that and then check back the concern again or try disabling that Cache plugin for the time being and then check back the concern again.
If the issue somehow still persists, then please share your Site WP-ADMIN Login details in the Private Content field so that we can check this concern on your Site and help you out accordingly.
Best Regards