File Upload Validation

It appears that file upload validation is not working properly. I have the following:

PHP Code:

// $Id: Notice.php,v 1.3 2019/08/27 19:36:24 dwinston Exp $

use CodeIgniter\Controller;

class Notice extends Controller
{
    private $validation;
    
    public function __construct(...$params)
    {
           $this->validation =  \Config\Services::validation();
       helper(['bnc', 'form']);
    }
    
    public function index()
    {
           print view('upload-notice', ['validation' => $this->validation]);
    }
    
    public function upload()
    {
           $messages = [
           'in_re' => [
                'required' => 'In Re: is required',
           ],
               'notice' => [
                   'mime_in' => 'Notice must be a PDF file',
                   'ext_in' => 'Notice must have a pdf extension',
                   'max_size' => 'Notice is too large',
               ],
        ];
        $rules = [
            'in_re' => 'required',
            'notice' => 'mime_in[notice, application/pdf]|ext_in[notice, pdf]|max_size[notice, 2048]',
        ];
        if ($this->request->getPost('submitted') == null || ! $this->validate($rules, $messages)) 
            print view('upload-notice', ['validation' => $this->validation]);
        else {
            $env = bnc_get_environment(); //bnc_helper
            $path = "/BSG/data/bnc/$env/public-notices";
            if (! file_exists($path)) mkdir($path, 0745, true);
            $filename = time() . '.' . $_FILES['notice']['name'];
            copy($_FILES['notice']['tmp_name'], "$path/$filename");
            print view('upload-msg', [
                'in_re' => $this->request->getPost('in_re'),
                'encoded_filename' => urlencode($filename),
            ]);
        }
    } 


Any pdf fails on mime type or extension validators. max size appears to work.

Simpler is always better