Issue #3127865 by tcrawford: reqtype field not correctly passed to form redirect

src/PluginForm/DatatransForm.php

@@ -45,7 +45,7 @@ class DatatransForm extends PaymentOffsiteForm {
 
     // Request type.
     if (!empty($gateway_config['req_type']) && $gateway_config['req_type'] != 'ignore') {
-      $payment_data['reqtype'] = $gateway_config['req_type'];
+      $data['reqtype'] = $gateway_config['req_type'];
     }
 
     // Handle security levels.