I have tested it on your site with the default WordPress Theme as well, and the issue persists with the default WordPress Theme as well, so it makes clear that the issue is not with our theme but with your WP or WOO, I suggest you to please contact WordPress or WooCommerce support and ask to fix it for you with the default WordPress Theme, once it will be fixed with the default WordPress Theme, it will automatically work fine with our theme as well.
