User warning: stat() No such file or directory and Warning: filesize(): stat failed errors for certain folders

filesize(), filectime() and filetype() functions fail on certain folders.

protected function createServerFileList($node, $relative_path) {
    // ...
    $files = file_scan_directory($directory, '/.*/', ['recurse' => false]);
    debug($files);
    // outputs all files in $directory

   foreach ($files as $key => $file) {
     $file->size = filesize($file->uri);
     $file->type = filetype($file->uri);
     $file->timestamp = filectime($file->uri);
       return $files;
  }

directory contains directories and files. For the files, the stat functions performs well. But for most (not all) of the directories the stat() functions will fail:

  User warning: stat(): No such file or directory in Twistor\FlysystemStreamWrapper->triggerError() (line 887 of
vendor\twistor\flysystem-stream-wrapper\src\FlysystemStreamWrapper.php).
Warning: filesize(): stat failed for s3://documenten in Drupal\filebrowser\ServerFileList->createServerFileList() (line 87 of modules\filebrowser\src\ServerFileList.php).
User warning: stat(): No such file or directory in Twistor\FlysystemStreamWrapper->triggerError() (line 887 of vendor\twistor\flysystem-stream-wrapper\src\FlysystemStreamWrapper.php).
Warning: filetype(): Lstat failed for s3://documenten in Drupal\filebrowser\ServerFileList->createServerFileList() (line 88 of modules\filebrowser\src\ServerFileList.php).
User warning: stat(): No such file or directory in Twistor\FlysystemStreamWrapper->triggerError() (line 887 of vendor\twistor\flysystem-stream-wrapper\src\FlysystemStreamWrapper.php).
Warning: filectime(): stat failed for s3://documenten in Drupal\filebrowser\ServerFileList->createServerFileList() (line 90 of modules\filebrowser\src\ServerFileList.php).

$schemes['s3'] = [
  'driver' => 's3',
  'config' => [
    'key'    => key,
    'secret' => secret,
    'region' => 'eu-west-1',
    'bucket' => 'nftr',

    #Optional configuration settings.
    #'options' => [
    #  'ACL' => 'public-read',
    #  'StorageClass' => 'REDUCED_REDUNDANCY',
    #],

  #'protocol' => 'https',
  #'prefix' => 'prefix',
  #'cname' => 'static.example.com',   // A cname that resolves to your bucket. Used for URL generation.
  ],

  'cache' => TRUE, // Creates a metadata cache to speed up lookups.
];