Address issue

It seems that customer's address information is not sent to Paytrail correctly. I was creating a custom hook to change the description and when I logged the API request I noticed that city (Espoo) is the current language code (en):

    [invoicingAddress] => stdClass Object
        (
            [streetAddress] => Metsäkukantie 4 F 11
            [postalCode] => 02330
            [city] => en
            [country] => FI
        )

And when I look at the two latest actual transactions (834372417 and 834210659) from the Paytrail Merchant Portal the address and the phone number fields are empty.