We have some reports from users that cloning a site that has Oxygen Builder plugin installed might result in missing parts on the cloned staging site. (like headers, sliders, etc…).
Deactivating the option below on the live site before the site is cloned should help in resolving this issue and making sure that the shortcodes are displayed correctly:
If after doing that some page content is still missing, then you might need to do “shortcodes resigning” following this guide:
https://oxygenbuilder.com/documentation/other/importing-exporting/#resigning