[Webkit-unassigned] [Bug 241851] New: AX: Voiceover does not add section to landmarks rotor menu if section aria-label added in markdown after some time

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=241851

            Bug ID: 241851
           Summary: AX: Voiceover does not add section to landmarks rotor
                    menu if section aria-label added in markdown after
                    some time
           Product: WebKit
           Version: Safari 15
          Hardware: Mac (Intel)
                OS: macOS 12
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Accessibility
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: jartik at gmail.com
                CC: andresg_22 at apple.com,
                    webkit-bug-importer at group.apple.com

Overview:
This situation can occur e.g. if ARIA label text is downloaded from server for chosen site/web app localization and added to markdown some time after page load.

Steps to Reproduce:
1). Please use the following code snippet:
<p>Text content</p>
<section aria-label="First section label">
  <h2>First section heading</h2>
  <p>First section content</p>
</section>
<section id="second">
  <h2>Second section heading</h2>
  <p>Second section content</p>
</section>
<script>
  const section = document.getElementById('second');
  setTimeout(() => {
    section.setAttribute('aria-label', 'Second section label');
  }, 500);
</script>

2). Open rotor menu by using VO + U key combination, navigate to Landmarks section

Actual Results: Region landmark is present only for first section

Expected Results: Region landmarks are present for both sections

Build Date & Hardware: Safari 15.5 (17613.2.7.1.8) on MacOS Monterey 12.4

Additional Information:
Although second section landmark is not added to rotor landmarks menu, it is properly read while traversing the page as region with label.

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