EditorIA11y does not detect heading level violations inside jQuery UI accordions (tested in 2.1.22 and 2.2.20)

Versions Tested

• 2.1.22
• 2.2.20

Problem / Motivation

EditorIA11y is not detecting heading hierarchy violations (H1–H6 structure issues)
when the headings are placed inside jQuery UI accordions.

This issue was first observed in 2.1.22 and persists after upgrading to
2.2.20.

Even when:

• The accordion panels are programmatically opened
• ed11yPanelOpened is triggered
• All accordion panels are manually opened before scanning

EditorIA11y does not detect heading violations inside the accordion content.

However, if I remove the jQuery UI accordion JavaScript library attachment
(so the content renders as normal static page content), EditorIA11y correctly
detects the heading violations.

This suggests the issue may be related to how EditorIA11y scans dynamically
controlled or initially hidden DOM elements.

Steps to Reproduce

1. Create content with heading hierarchy violations inside a jQuery UI accordion.
2. Initialize accordions using jQuery UI.
3. Trigger ed11yPanelOpened.
4. Programmatically open all accordion panels.
5. Run the EditorIA11y scan.

Result

EditorIA11y does not detect heading level violations inside accordion panels.

Control Test

• Remove the jQuery UI accordion JS library.
• Allow content to render fully expanded (no collapsing behavior).
• Run EditorIA11y scan.

Result

EditorIA11y correctly detects heading violations.

Example Markup Used for Testing

<h2>
    Header H2
</h2>

<h1>
    Main Page Title
</h1>

<!-- ❌ Skipping H2 -->
<h3>
    Section Title
</h3>

<p>
    This section content skips the H2 heading level.
</p>

<!-- ❌ Multiple H1s used incorrectly -->
<h1>
    Another Main Title
</h1>

Expected violations:

• Skipped heading level (H1 → H3)
• Multiple H1 elements used incorrectly

Environment

• Drupal site
• jQuery UI accordion for collapsible content
• EditorIA11y versions tested: 2.1.22 and 2.2.20

Expected Behavior

EditorIA11y should detect heading hierarchy violations inside accordion content
when the panels are open and visible in the DOM.