FCM push notifications do not arrive with the app closed

When the app is open or behind the scenes, all right, notifications arrive, but when the app is closed, it only arrives on some cell phones.

For example, in a Sony it arrives very well when the app is closed, but in a Huawei Y6 it does not arrive if the app is closed.

Code:

public class MyFirebaseInstanceIDService extends FirebaseInstanceIdService {
    private static final String TAG = "MyFirebaseIIDService";

    @Override
    public void onTokenRefresh() {

        //Getting registration token
        String refreshedToken = FirebaseInstanceId.getInstance().getToken();

       // SharedPreferences.getInstance(getApplicationContext()).setString(SPKeys.Keys.API_TOKEN,refreshedToken);
        //Displaying token on logcat
        Log.d(TAG, "Refreshed token: " + refreshedToken);

    }
}

public class MyFirebaseMessagingService extends FirebaseMessagingService {

    private static final String TAG = "MyFirebaseMsgService";

    @Override
    public void handleIntent(Intent intent) {
        super.handleIntent(intent);
        try {
            if (intent.getExtras() != null) {
                Log.i(TAG, "handleIntent: " + intent.getExtras().toString());

                if (!isAppIsInBackground(getApplicationContext())) {
                    String title = intent.getExtras().get("gcm.notification.title").toString();
                    String body = intent.getExtras().get("gcm.notification.body").toString();
                    String url = intent.getExtras().get("URL").toString();


                    sendNotification(title, body, url);
                } else {
                    Utility.PUSH_NOTIFICATIONMESSAGE = intent.getExtras().get("URL").toString();
                    Log.d(TAG, "Refreshed token: en handle intent " + Utility.PUSH_NOTIFICATIONMESSAGE);
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
            Log.d(TAG, "Refreshed token: en catch " + Utility.PUSH_NOTIFICATIONMESSAGE);
        }
    }


    private void sendNotification(String messageBody, String tittle, String urlIMG) {
        PendingIntent pendingIntent = null;
        if (urlIMG == null && urlIMG.equalsIgnoreCase("")) {
            Intent intent = new Intent(this, MainActivity.class);
            intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
            pendingIntent = PendingIntent.getActivity(this, 0, intent,
                    PendingIntent.FLAG_ONE_SHOT);
        } else {
            Uri uri = Uri.parse(urlIMG);
            Intent intent = new Intent(Intent.ACTION_VIEW, uri);
            intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
            pendingIntent = PendingIntent.getActivity(this, 0, intent,
                    PendingIntent.FLAG_ONE_SHOT);
        }

        Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        final  NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this);
        /*notificationBuilder.setSmallIcon(R.mipmap.ic_launcher);
        notificationBuilder.setLargeIcon(BitmapFactory.decodeResource(getApplicationContext().getResources(), R.mipmap.ic_launcher));*/
        notificationBuilder.setSmallIcon(R.drawable.ic_notifications_black_24dp);
        notificationBuilder.setLargeIcon(BitmapFactory.decodeResource(getApplicationContext().getResources(), R.mipmap.ic_launcher));

        notificationBuilder.setContentTitle(tittle);
        notificationBuilder.setContentText(messageBody);
        notificationBuilder.setAutoCancel(true);
        notificationBuilder.setSound(defaultSoundUri);
        notificationBuilder.setContentIntent(pendingIntent);

    }


    public static boolean isAppIsInBackground(Context context) {
        boolean isInBackground = true;
        ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
        if (Build.VERSION.SDK_INT > Build.VERSION_CODES.KITKAT_WATCH) {
            List<ActivityManager.RunningAppProcessInfo> runningProcesses = am.getRunningAppProcesses();
            for (ActivityManager.RunningAppProcessInfo processInfo : runningProcesses) {
                if (processInfo.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND) {
                    for (String activeProcess : processInfo.pkgList) {
                        if (activeProcess.equals(context.getPackageName())) {
                            isInBackground = false;
                        }
                    }
                }
            }
        } else {
            List<ActivityManager.RunningTaskInfo> taskInfo = am.getRunningTasks(1);
            ComponentName componentInfo = taskInfo.get(0).topActivity;
            if (componentInfo.getPackageName().equals(context.getPackageName())) {
                isInBackground = false;
            }
        }

        return isInBackground;
    }
}

and in my Manifest:

    <meta-data
        android:name="com.google.firebase.messaging.default_notification_color"
        android:resource="@android:color/transparent" />

    <!-- Firebase Notifications -->
    <service android:name=".notification.MyFirebaseMessagingService">
        <intent-filter>
            <action android:name="com.google.firebase.MESSAGING_EVENT" />
        </intent-filter>
    </service>

    <service android:name=".notification.MyFirebaseInstanceIDService">
        <intent-filter>
            <action android:name="com.google.firebase.INSTANCE_ID_EVENT" />
        </intent-filter>
    </service>