SoftDeletes Memory issue with php 7.4 and Illuminate 7.9.2 - eloquent

Question

We have a project with eloquent (without Laravel).
Recently we upgrade to php 7.4, and then Iluminate/database to 7.9.2
In seeder, when we insert data into model without SofDelete, it works.
But when model have softdelete, it hangs.
Example Role:
use Illuminate\Database\Eloquent\Model as Eloquent;
class Role extends Eloquent {
protected $table = 'usuarios_roles';
public $timestamps = true;
...
$admin = Role::create(array(
'nombre' => 'Admin',
'vista' => '1',
'path' => '/admin/clientes/',
'editables' => 0
));
Works fine.
Example User:
require_once('EloquentRegAcc.php');
use Illuminate\Database\Eloquent\SoftDeletes;
class Usuario extends EloquentRegAcc
{
use SoftDeletes;
public $timestamps = true;
protected $dates = ['deleted_at'];
protected $table = 'usuarios';
...
$usuario_admin = Usuario::create(array(
'id_role' => $admin2->id,
'nombre' => 'Admin',
'email' => $email,
'password' => $password2,
'permissions' => '{}'
));
It give us an error:
PHP Fatal error: Allowed memory size of 4294967296 bytes exhausted (tried to allocate 20480 bytes) in /home/vagrant/code/project/vendor/illuminate/database/Eloquent/SoftDeletes.php on line 36
We try to upgrade Vagrant RAM, from 2GB to 4GB, and set ini_set('memory_limit', '4096M') , but no way.
In the database we have roles, but not users.
Same code with php 7.1 and Iluminate/database 5.x works fine.
not matter if is user or other table; if model have SoftDelete, hangs.

Answer 1

We have a "homemade" log in the app.
If we change
require_once('EloquentRegAcc.php');
use Illuminate\Database\Eloquent\SoftDeletes;
class Usuario extends EloquentRegAcc
{
To
use Illuminate\Database\Eloquent\Model as Eloquent;
use Illuminate\Database\Eloquent\SoftDeletes;
class Usuario extends Eloquent
{
Works as spect. We need to rewrite or log.