Same relationship works in one event listener but not in the other one which is the same

Hello I’m facing this problem. I have this 2 listeners which are the same.

What I do not understand is that in SendTargetCompletedNotification when trying to access $event->client->contacts I get the error Undefined property: IlluminateDatabaseEloquentRelationsBelongsTo::$contacts but doing the same in SendTargetAssignedContactNotification works. Also if I access $client->contacts before entering SendTargetCompletedNotification It returns the contacts, so it should work apparently.

<?php

namespace AppListeners;


use AppEventsTargetCompleted;
use AppNotificationsTargetCompletedContactNotification;
use IlluminateContractsQueueShouldQueue;
use IlluminateQueueInteractsWithQueue;
use IlluminateSupportFacadesNotification;

class SendTargetCompletedContactNotification
{
    /**
     * Create the event listener.
     *
     * @return void
     */
    public function __construct()
    {
        //
    }

    /**
     * Handle the event.
     *
     * @param  AppProvidersTargetCompleted  $event
     * @return void
     */
    public function handle(TargetCompleted $event)
    {
        dd($event->client->contacts);
        foreach($event->client->contacts as $contact) {
            $contact->notify(new TargetCompletedContactNotification($event->kpi, $event->points));
        }
    }
}

<?php

namespace AppListeners;

use AppEventsTargetAssigned;
use AppNotificationsTargetAssignedContactNotification;
use IlluminateContractsQueueShouldQueue;
use IlluminateQueueInteractsWithQueue;
use IlluminateSupportFacadesNotification;

class SendTargetAssignedContactNotification
{
    /**
     * Create the event listener.
     *
     * @return void
     */
    public function __construct()
    {
        //
    }

    /**
     * Handle the event.
     *
     * @param  AppProvidersTargetAssigned  $event
     * @return void
     */
    public function handle(TargetAssigned $event)
    {
        dd($event->client->contacts);
        foreach ($event->client->contacts as $contact) {
            $contact->notify(new TargetAssignedContactNotification($event->kpi, $event->causer));
        }
    }
}