Hello,
Thanks for using our theme and for contacting us.
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 the cache of the browser, and check then. Maybe one of the additional plugins is a reason for the problem.
2/ Try to disable “Ajax Product Filters” in Theme Options > WooCommerce > Shop > Shop page Filters
3/ Please provide temporary wp-admin and FTP access, so we can take a closer look.
Regards