CKEditor 5 using front-end theme templates when rendering media

Is this related to 🐛 _ckeditor5_theme_css() not called. ckeditor5-stylesheets not working Active ?

It very well could be, though I mistakenly left out a vital bit of information in my original post. This isn't so much a CSS issue as it is a template issue.

I have the following preprocess in my front-end theme's .theme file, and it is effecting the rendering of elements within CKEditor 5 with the admin theme. To note, I am using the Gin admin theme.

function theme_preprocess_image(array &$variables) {
  // Remove the "title" attribute from the image element.
  unset($variables['attributes']['title']);

  // Check if the "loading" attribute is set to "lazy".
  if (isset($variables['attributes']['loading']) && $variables['attributes']['loading'] === 'lazy') {
    $variables['attributes']['class'][] = 'lazy';
    unset($variables['attributes']['loading']);

    // If the "src" attribute is set, move it to "data-src".
    if (isset($variables['attributes']['src'])) {
      $variables['attributes']['data-src'] = $variables['attributes']['src'];
      unset($variables['attributes']['src']);
    }

    // If the "srcset" attribute is set, unset it in favor of sibling source elements.
    if (isset($variables['attributes']['srcset'])) {
      unset($variables['attributes']['srcset']);
    }

    // If the "sizes" attribute is set, unset it in favor of sibling source elements.
    if (isset($variables['attributes']['sizes'])) {
      unset($variables['attributes']['sizes']);
    }
  }
}