QuickPay-Callback-Url header is ignored

[mthorsdal]

When making a post request to /payments/{id}/capture, the additional header QuickPay-Callback-Url seem not to be attached - unless quickpay api ignores it. It insists on falling back to default callback url

$this->quickpay = new QuickPay(
':' . $api_key
[
'QuickPay-Callback-Url' => $callbackUrl
]
);

         // Capture the payment via QuickPay
        $response = $this->quickpay->request->post(
            "/payments/{$cardAuthorization->system_id}/capture",
            [
                'amount' => $validated['amount_in_cents'],
                'raw' => [
                    'synchronized' => $request->query('synchronized', false)
                ]
            ]
        );