Emphasise/call out the note about `.invisible` and AT

site/content/docs/5.0/utilities/visibility.md

@@ -5,7 +5,11 @@ description: Control the visibility, without modifying the display, of elements
 group: utilities
 ---
 
-Set the `visibility` of elements with our visibility utilities. These utility classes do not modify the `display` value at all and do not affect layout – `.invisible` elements still take up space in the page. Content will be hidden both visually and for assistive technology/screen reader users.
+Set the `visibility` of elements with our visibility utilities. These utility classes do not modify the `display` value at all and do not affect layout – `.invisible` elements still take up space in the page.
+
+{{< callout warning >}}
+Elements with the `.invisible` class will be hidden *both* visually and for assistive technology/screen reader users.
+{{< /callout >}}
 
 Apply `.visible` or `.invisible` as needed.