Problem with Model()->find() and Model()->findAll()

Hi! I have faced with problem with Model()->find() and Model()->findAll(). If i call ones of this methods i get null. It's doesn't work after update to 4.0.0-rc.2.1 with composer.

Hi guys, I have the same problem.
I'm using CI v4.0.0-rc.3 and couldn't get results using find() and findAll() methods.

Just two simple files.

Product model:

PHP Code:

<?php namespace App\Models;

use CodeIgniter\Model;

class Product extends Model
{
    protected $table = 'products';
    protected $primaryKey = 'ID';
} 


Catalog controller:

PHP Code:

<?php namespace App\Controllers;

use CodeIgniter\Controller;
use App\Models\Product;

class Catalog extends Controller
{
    public function product(string $ID = '')
    {
        $productModel = new Product();
        // working
        $product = $productModel->where('ID', $ID)->get()->getRowArray();
        d($product);

        // not working
        $product = $this->productModel->find($ID);
        d($product);
    }
} 


Could you help me in fixing it?
Thanks for your support.