How to only make a notification sound without notification banner

When I call the completion handler from the following User Notification Center delegate function and pass UNNotificationPresentationOptions.sound I still get the notification banner:

override func userNotificationCenter(
		_ 						center: 			UNUserNotificationCenter,
		willPresent 			notification: 		UNNotification,
		withCompletionHandler 	completionHandler: 	@escaping (UNNotificationPresentationOptions) -> Void
	) {
		completionHandler(.sound)
	}

All I want is a way to just make a notification sound without showing the notification while the app is in the foreground.

Any ideas?

This is how I am requesting authorization:

[[UNUserNotificationCenter currentNotificationCenter] requestAuthorizationWithOptions: (UNAuthorizationOptionBadge | UNAuthorizationOptionSound)
									  completionHandler: ^ (BOOL granted, NSError * _Nullable error) {
		}];

This is the notification request:

var notification 	= UNMutableNotificationContent()

if (notification != nil) {
notification.categoryIdentifier = "id"
notification.sound 				= .default
notification.title = "title"
notification.body = "body"

request = UNNotificationRequest(
  identifier: NSUUID().uuidString,
  content: 	notification,
  trigger: 	nil
)

UNUserNotificationCenter.current().add(request) { (error) in

}