Accordion multiple mode not allowing multiple sections open

[mwarman]

Describe the bug

Using an Accordion with multiple mode enabled should allow more than one section to be open and visible at one time. However, any open section is always closed when clicking another section. And sometimes all sections are closed.

Steps to reproduce

Steps to reproduce the behavior:

1. Go to the Accordion components page.
2. Click on various sections of the Accordion in the "multiple" section.
3. The Accordion should allow multiple sections to be open at one time.

Expected behavior

The Accordion should allow multiple sections to be open at one time.

Screenshots

If applicable, add screenshots to help explain your problem.

Environment

Desktop (please complete the following information):

• OS: Ubuntu 24.04
• Browser: Chrome
• Version: 144.0.7559.132 (Official Build) (64-bit)

Additional context

• likely an issue introduced after upgrading dependencies