I launched a new WooCommerce site for a client last week. She had added custom metadata with Smart Crawl to many of the products but since putting the site live, this custom metadata has vanished.
The product URLs have changed as the site has changed from dev to live domain and we've also implemented the "Perfect SEO URLs" plugin which removes the default "store" and "product" slugs.
It's the same site, same files, and database. It was just DNS that changed it from dev to live.