File field does not validate or remember it's file in the customizer

The file field validation does not work, and the filed does not remember its file if it is a customizer setting

      $fields[] = [
        'title' => __('Favicons', NAME_SPACE),
        'id' => PREFIX . 'favicon',
        'settings_pages' => [PREFIX . 'favicon'],
        // 'option_name' => 'theme_mods_' . NAME_SPACE,
        // 'panel' => '',

        'fields' => [
          [
            'id'               => PREFIX . 'favicon',
            'name'             => __('ICO-Favicon', NAME_SPACE),
            'type'             => 'file',
            'force_delete'     => true,
            'max_file_uploads' => 1,
            'upload_dir' => ABSPATH . $symlink,
            'unique_filename_callback' => '\ModernFavicon\ModernFavicon::favicon_filename',
            'desc' => __('Die .ico Datei sollte PNG-Bilder in den Größen <code>16 x 16, 32 x 32, und 48 x 48</code> bereitstellen.'),
            'label_description' => __('Für Safari (Desktop)')
          ],
          [
            'id'               => PREFIX . 'apple-touch-icon',
            'name'             => __('Apple-Touch Icon', NAME_SPACE),
            'type'             => 'file',
            'force_delete'     => true,
            'max_file_uploads' => 1,
            'upload_dir' => ABSPATH . $symlink,
            'unique_filename_callback' => '\ModernFavicon\ModernFavicon::touchicon_filename',
            'desc' => __('Das PNG-Bild sollte <code>180 x 180</code> Pixel groß sein.'),
            'label_description' => __('Für iPhones ud iPads')
          ],
          [
            'id'               => PREFIX . 'manifest_512',
            'name'             => __('Manifest PNG – 512px', NAME_SPACE),
            'type'             => 'file',
            'force_delete'     => true,
            'max_file_uploads' => 1,
            'upload_dir' => ABSPATH . $symlink,
            'unique_filename_callback' => '\ModernFavicon\ModernFavicon::manifest512_filename',
            'desc' => __('Das PNG-Bild sollte <code>512 x 512</code> Pixel groß sein.'),
            'label_description' => __('Für Android-Geräte')
          ],
          [
            'id'               => PREFIX . 'manifest_192',
            'name'             => __('Manifest PNG – 192px', NAME_SPACE),
            'type'             => 'file',
            'force_delete'     => true,
            'max_file_uploads' => 1,
            'upload_dir' => ABSPATH . $symlink,
            'unique_filename_callback' => '\ModernFavicon\ModernFavicon::manifest192_filename',
            'desc' => __('Das PNG-Bild sollte <code>192 x 192</code> Pixel groß sein.'),
            'label_description' => __('Für Android-Geräte')
          ],
          [
            'id'               => PREFIX . 'svg_icon',
            'name'             => __('SVG Site-Icon', NAME_SPACE),
            'type'             => 'file',
            'force_delete'     => true,
            'max_file_uploads' => 1,
            'upload_dir' => ABSPATH . $symlink,
            'unique_filename_callback' => '\ModernFavicon\ModernFavicon::svgicon_filename',
            'desc' => __('Das Seitenverhältnis der SVG-Grafik sollte quadratisch sein.'),
            'label_description' => __('Für alle anderen Browser')
          ],
        ],

        'validation' => [
          'rules'  => [
            PREFIX . 'favicon' => [
              'accept' => ['image/vnd.microsoft.icon', 'image/x-icon'],
              'extension' => 'ico'
            ],
            PREFIX . 'apple-touch-icon' => [
              'accept' => ['image/png'],
              'extension' => 'png'
            ],
            PREFIX . 'manifest' => [
              'accept' => ['image/png'],
              'extension' => 'png'
            ],
            PREFIX . 'svg_icon' => [
              'accept' => ['image/svg+xml'],
              'extension' => 'svg'
            ],
          ],
          'messages' => [
            PREFIX . 'favicon' => [
              'accept'  => __('Die Datei hat keinen gültigen ico Mime-Typ.', NAME_SPACE),
              'extension' => __('Die Dateiendung muss <code>.ico</code> sein.', NAME_SPACE),
            ],
            PREFIX . 'apple-touch-icon' => [
              'accept'  => __('Die Datei hat keinen gültigen png Mime-Typ.', NAME_SPACE),
              'extension' => __('Die Dateiendung muss <code>.png</code> sein.', NAME_SPACE),
            ],
            PREFIX . 'manifest' => [
              'accept'  => __('Die Datei hat keinen gültigen png Mime-Typ.', NAME_SPACE),
              'extension' => __('Die Dateiendung muss <code>.png</code> sein.', NAME_SPACE),
            ],
            PREFIX . 'svg_icon' => [
              'accept'  => __('Die Datei hat keinen gültigen svg Mime-Typ.', NAME_SPACE),
              'extension' => __('Die Dateiendung muss <code>.svg</code> sein.', NAME_SPACE),
            ],
          ],
        ],
      ];

the code above works as expected, but not when I modify it to

        // 'settings_pages' => [PREFIX . 'favicon'],
        'option_name' => 'theme_mods_' . NAME_SPACE,
        'panel' => '',