[Kassa Compleet] Why is the customer's name absent on a transaction screen being passed in the «POST /v1/orders/» request?

The request’s full data:

{
	"amount": 2500,
	"client": {
		"user_agent": "Ginger-Python-ApiClient/0.8.1 Requests/2.11.1 Python/2.7.10"
	},
	"created": "2017-02-28T11:01:41.477453+00:00",
	"currency": "EUR",
	"customer": {
		"address": "Amsterdam Rusland 17",
		"address_type": "billing",
		"country": "NL",
		"email_address": "admin@mage2.pro",
		"first_name": "Dmitry",
		"housenumber": "17",
		"ip_address": "5.9.188.84",
		"last_name": "Fedyuk",
		"locale": "nl_NL",
		"merchant_customer_id": "123",
		"phone_numbers": [
			"+31 20 623 1231"
		],
		"postal_code": "1012"
	},
	"description": "An example of description.",
	"expiration_period": "PT15M",
	"flags": [
		"is-test"
	],
	"id": "66a07732-19c3-4b3f-aa46-59e2f44b5cb7",
	"last_transaction_added": "2017-02-28T11:01:42.246784+00:00",
	"merchant_id": "0c01d91a-fc38-452c-8b55-6b1a07f720eb",
	"merchant_order_id": "order-234192",
	"modified": "2017-02-28T11:01:42.745537+00:00",
	"project_id": "d81c89ad-e9d5-42d0-ad88-f1c580256133",
	"return_url": "https://mage2.pro",
	"status": "new",
	"transactions": [
		{
			"amount": 2500,
			"balance": "test",
			"created": "2017-02-28T11:01:42.246784+00:00",
			"credit_debit": "credit",
			"currency": "EUR",
			"description": "An example of description.",
			"events": [
				{
					"event": "new",
					"id": "91281845-236d-4c15-b863-85783bdb4734",
					"noticed": "2017-02-28T11:01:42.615411+00:00",
					"occurred": "2017-02-28T11:01:42.246784+00:00",
					"source": "set_status"
				}
			],
			"expiration_period": "PT15M",
			"id": "7e10c60d-0a16-4d75-bb1a-3a46f2f0858a",
			"merchant_id": "0c01d91a-fc38-452c-8b55-6b1a07f720eb",
			"modified": "2017-02-28T11:01:42.664432+00:00",
			"order_id": "66a07732-19c3-4b3f-aa46-59e2f44b5cb7",
			"payment_method": "ideal",
			"payment_method_details": {
				"issuer_id": "INGBNL2A"
			},
			"payment_url": "https://api.kassacompleet.nl/redirect/7e10c60d-0a16-4d75-bb1a-3a46f2f0858a/to/payment/",
			"product_type": "kassacompleet",
			"project_id": "d81c89ad-e9d5-42d0-ad88-f1c580256133",
			"status": "new"
		}
	]
}