Hello,
Sorry for the delay in answering.
1/ Do you have the mentioned issue when the parent theme is activated on your site?
2/ 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 browser, and check then. Maybe one of the additional plugins is a reason for the problem.
Regards