objective-c - iOS9 NSDefaultRunLoopMode が didRegisterForRemoteNotificationsWithDeviceToken デリゲートをリッスンしない

Question

iOS 9 では、

[[NSRunLoop currentRunLoop] runMode:NSDefaultRunLoopMode beforeDate:timeoutDate];

didRegisterForRemoteNotificationsWithDeviceTokenリッスンもデリゲートも行いませんが、他のデリゲートdidFailToRegisterForRemoteNotificationsWithErrorをリッスンします。iOS 7 と iOS 8 では問題なく動作していました。applicationDidEnterBackgroundUIApplication

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
   [[UIApplication sharedApplication] registerUserNotificationSettings:[UIUserNotificationSettings settingsForTypes:(UIUserNotificationTypeSound | UIUserNotificationTypeAlert | UIUserNotificationTypeBadge) categories:nil]];
   [[UIApplication sharedApplication] registerForRemoteNotifications];

   dispatch_async(dispatch_get_main_queue(), ^{
        [self waitForCompletion:30];
   });
  return YES;
}

- (bool)waitForCompletion:(NSTimeInterval)timeoutSecs {
   NSDate *timeoutDate = [NSDate dateWithTimeIntervalSinceNow:timeoutSecs];
   do {
    [[NSRunLoop currentRunLoop] runMode:NSDefaultRunLoopMode beforeDate:timeoutDate];
    if ([timeoutDate timeIntervalSinceNow] < 0.0)
        break;
   } while (!_done);
   return _done;
}

- (void)application:(UIApplication*)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData*)deviceToken {
   // send device token to server
   _done = true;
}

application:didRegisterForRemoteNotificationsWithDeviceToken常に 30 秒後に呼び出します (タイムアウト値)。