Hello, Tiago,
Thank you for reaching out to us.
1/ We suggest activating another theme, specifically the Storefront (default WooCommerce theme), which can be found under Appearance > Themes in your dashboard. This test should help determine if the issues persist irrespective of the theme used.
2/ Try to disable all third-party plugins that are not included with XStore
(https://www.8theme.com/documentation/xstore/plugins/included-plugins/). After doing so, please clear your browser’s cache and check again. It is possible that one of these additional plugins is causing the problem.
Best Regards,
8Theme’s Team