Hello,
Thanks for using our theme.
We did the update on our demos, and do not see the problem, for example – https://xstore.8theme.com/demos/2/lingerie/
In your case:
1) Try to disable all the third-party plugins (including cache plugins), that do not come bundled with XStore https://xstore.helpscoutdocs.com/article/36-included-plugins , clear cache of your browser, and check how it works then.
2) If disabling of plugins doesn’t help, provide temporary wp-admin access, so we can take a closer look.
Regards