ProxyPanel/app/Observers/UserGroupObserver.php

<?php

namespace App\Observers;

use App\Jobs\VNet\reloadNode;
use App\Models\Node;
use App\Models\UserGroup;
use Arr;

class UserGroupObserver
{

    public function created(UserGroup $userGroup): void
    {
        $nodes = Node::whereType(4)->whereIn('id', $userGroup->nodes)->get();
        if ($nodes) {
            reloadNode::dispatchNow($nodes);
        }
    }

    public function updated(UserGroup $userGroup): void
    {
        $changes = $userGroup->getChanges();
        if (Arr::exists($changes, 'nodes')) {
            $nodes = Node::whereType(4)
                         ->whereIn(
                             'id',
                             array_diff(
                                 $userGroup->nodes,
                                 $userGroup->getOriginal('nodes') ?: []
                             )
                         )
                         ->get();
            if ($nodes) {
                reloadNode::dispatchNow($nodes);
            }
        }
    }

}