Recently we've tightened our validation on the billing and shipping addresses in EZ Importer. We've decided to make the validation strict because orders that have invalid shipping or billing addresses "fail silently" in Shopify. This means, Shopify imports the order successfully but they ignore the shipping or billing address you've provided.

For example, if you import an order with an address that doesn't have a country, the order will import successfully and you'll see all of the order data …