Vonage notifications sent multiple times

Hi, in our app we are just triggering the notification once, however there are sent 3 or sometimes 4 sms notifications from Vonage.

Our logs looks like this:

[2024-07-12 07:45:02] production.DEBUG: About to send a vonage notification from Before Leave Notification.  
[2024-07-12 07:45:05] production.INFO: {"msisdn":"xxxxx273348","to":"xxxxx432606","network-code":"24001","messageId":"b769c6e5-c44f-4850-bc7c-59489043b912","price":"0.05440000","status":"delivered","scts":"2407120945","err-code":"0","api-key":"x","message-timestamp":"2024-07-12 07:45:05"}  
[2024-07-12 07:45:06] production.INFO: {"msisdn":"xxxxx273348","to":"xxxxx432606","network-code":"24001","messageId":"cb031e58-58ab-4afa-b667-0285812f6455","price":"0.05440000","status":"delivered","scts":"2407120945","err-code":"0","api-key":"x","message-timestamp":"2024-07-12 07:45:06"}  
[2024-07-12 07:45:06] production.INFO: {"msisdn":"xxxxx273348","to":"xxxxx432606","network-code":"24001","messageId":"a46d3bf8-bb33-40fd-af40-df5a5da9ed5e","price":"0.05440000","status":"delivered","scts":"2407120945","err-code":"0","api-key":"x","message-timestamp":"2024-07-12 07:45:06"}  
[2024-07-12 07:45:07] production.INFO: {"msisdn":"xxxxx273348","to":"xxxxx432606","network-code":"24001","messageId":"915b543d-6a24-4b78-b6fb-a8f2057d3c0f","price":"0.05440000","status":"delivered","scts":"2407120945","err-code":"0","api-key":"x","message-timestamp":"2024-07-12 07:45:07"}  

The "About to send vonage notification..." is logged on the line before we trigger the notification.

Here is one example of a command sending a notification:

<?php

namespace App\Console\Commands;

use App\Models\Order;
use App\Notifications\BeforeLeaveNotification;
use Illuminate\Console\Command;
use Illuminate\Support\Facades\Log;

class CheckUpcomingLeaveCars extends Command
{
    /**
     * The name and signature of the console command.
     *
     * @var string
     */
    protected $signature = 'app:check-upcoming-leave-cars';

    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = 'Command description';

    /**
     * Execute the console command.
     */
    public function handle()
    {
        $orders = Order::query()
            ->where(function ($query) {
                $query->where('paid', true)
                    ->orWhere('invoice', true);
            })
            ->whereDate('arrive_date', now()->addDay())
            ->whereTime('arrive_time', '<=', now()->format('H:i'))
            ->where('leave_notification_sent', false)
            ->with('user')
            ->get();

        foreach ($orders as $order) {
            // Send notification
            Log::info('Sending notification from CheckUpcomingLeaveCars: ' . $order->uuid);

            $order->user->notify(new BeforeLeaveNotification($order));

            $order->update([
                'leave_notification_sent' => true,
            ]);
        }
    }
}

And here is one of the notifications itself:

<?php

namespace App\Notifications;

use App\Models\Order;
use Illuminate\Bus\Queueable;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Notifications\Messages\MailMessage;
use Illuminate\Notifications\Messages\VonageMessage;
use Illuminate\Notifications\Notification;
use Illuminate\Support\Facades\Log;

class BeforeLeaveNotification extends Notification
{
    use Queueable;

    public Order $order;

    /**
     * Create a new notification instance.
     */
    public function __construct(Order $order)
    {
        $this->order = $order;
    }

    /**
     * Get the notification's delivery channels.
     *
     * @return array<int, string>
     */
    public function via(object $notifiable): array
    {
        return ['vonage'];
    }

    public function toVonage(object $notifiable): VonageMessage
    {
        Log::debug('About to send a vonage notification from Before Leave Notification.');

        return (new VonageMessage)
            ->statusCallback(route('vonage.webhook'))
            ->content('Secret message...')
            ->unicode();
    }

    /**
     * Get the array representation of the notification.
     *
     * @return array<string, mixed>
     */
    public function toArray(object $notifiable): array
    {
        return [
            //
        ];
    }
}

I have been searching and making sure that every notification for real is only triggered once. Logging just before every notification is sent and that line is only printed once, but the callback logging from "Vonage webhook" is triggered multiple times.

Route::any('/vonage/webhook', function () {
    // Body of request to json string
    $body = json_encode(request()->all());
    // Log the body of the request
    Log::info('Vonage webhook body:' . $body);

    return response()->json([
        'status' => 'ok',
    ]);
})->name('vonage.webhook');

What on earth may cause this? I am so confused.