Hello,
Describe by you problem is almost not visible to us. But you can try the next:
– Header Builder > Cart > Mini-Cart Type > None. Clear cache and check how it works then.
– 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 the reason for the problem.
Regards