Bug: [Factories] preferApp does not work for classes with the same short name

[kenjis]

Related: #7694

When we load a class in non-App namespace ('Acme\Blog\Models\UserModel') with 'preferApp' => false,
and load a class which has the same short name ('UserModel' or 'App\Models\UserModel') with 'preferApp' => true,
the instance in non-App namespace will be returned.

preferApp | boolean | Whether a class with the same basename in the App namespace overrides other explicit class requests.
https://codeigniter4.github.io/CodeIgniter4/concepts/factories.html#factories-options

Steps to Reproduce

--- a/app/Config/Autoload.php
+++ b/app/Config/Autoload.php
@@ -42,6 +42,7 @@ class Autoload extends AutoloadConfig
     public $psr4 = [
         APP_NAMESPACE => APPPATH, // For custom app namespace
         'Config'      => APPPATH . 'Config',
+        'Acme\Blog'   => ROOTPATH . 'acme/Blog',
     ];
 
     /**

<?php

namespace App\Models;

use CodeIgniter\Model;

class UserModel extends Model
{
    protected $table = 'users';
}

<?php

namespace Acme\Blog\Models;

class UserModel
{
}

<?php

namespace App\Controllers;

use CodeIgniter\Config\Factories;

class Home extends BaseController
{
    public function index()
    {
        $users1 = Factories::models('Acme\Blog\Models\UserModel', ['preferApp' => false]);
        $users2 = Factories::models('UserModel', ['preferApp' => true]);

        return get_class($users1) . ', ' . get_class($users2);
    }
}

Results:

Acme\Blog\Models\UserModel, Acme\Blog\Models\UserModel

[kenjis]

Although difficult to understand, this may not be a bug.

Once an instance is held in Factories, it is a specification that the shared instance will be returned.

When 'UserModel' is specified, the shared UserModel instance is returned, so the option 'preferApp' => true passed at runtime is ignored.

Anyway #7733 will solve this issue.

[kenjis]

Closed by v4.4.0.