ARIA attributes on contenteditable are not properly announced

Phenomenon

When ARIA attributes (like role, aria-label, aria-describedby) are applied to contenteditable regions, screen readers may not properly announce them in Safari. The accessibility information is lost.

Reproduction example

1. Create a contenteditable div with ARIA attributes:

   <div contenteditable role="textbox" aria-label="Editor" aria-describedby="help-text">
     Content here
   </div>

2. Enable VoiceOver.
3. Navigate to the contenteditable.
4. Observe what is announced.

Observed behavior

• In Safari on macOS, ARIA attributes may not be announced by screen readers.
• The role and label information is lost.
• Users relying on screen readers may not understand the purpose of the element.

Expected behavior

• ARIA attributes should be properly announced by screen readers.
• Role, label, and description should be communicated.
• The element should be accessible to assistive technologies.