Hello, @DCD,
Sorry for the inconvenience but First of all, I can see you are using the old version of the theme 8.3.5 and the very latest version of the theme is 8.3.6, so please update your theme and the core plugin to the very latest version and check back.
You can check the theme changelog here: https://xstore.8theme.com/update-history/
How to update the Theme: https://xstore.helpscoutdocs.com/article/63-theme-update
After that activate the parent theme and check back.
And If after that the issue will still persists then Please try to disable all the third-party plugins (including cache plugins), that does not come bundled with XStore https://xstore.helpscoutdocs.com/article/36-included-plugins , clear the cache of the browser, and check then. Maybe one of the additional plugins is the reason for the problem.
And if the issue will still persist then please remain all the third-party plugins deactivated on your site and allow permission to debug your site which includes deactivating all the third-party plugins and on-site Customization as well so that I will check and assist you accordingly.
Note: Please take the complete backup of your site first.
Regards 8Themes Team.