v5.2.1 dropdown TypeError

Prerequisites

• I have searched for duplicate or closed issues
• I have validated any HTML to avoid common problems
• I have read the contributing guidelines

Describe the issue

<div class="dropdown">
  <ul class="dropdown-menu">
    <li class="d-block d-lg-none">
      <h6 class="dropdown-header text-wrap">
        WHATEVER
      </h6>
    </li>
    <li>
      <hr class="dropdown-divider d-block d-md-none">
    </li>
    <li>
      <button class="dropdown-item" type="button">Logout</button>
    </li>
  </ul> <!-- .dropdown-menu -->
</div> <!-- .dropdown -->

Uncaught TypeError: this._menu is undefined
    _isShown bootstrap.bundle.js:4040
    toggle bootstrap.bundle.js:3910
    <anonymous> bootstrap.bundle.js:4241
    handler bootstrap.bundle.js:397
    invokeTask zone.js:406
    runTask zone.js:178
    invokeTask zone.js:487
    invokeTask zone.js:1661
    globalCallback zone.js:1704
    globalZoneAwareCaptureCallback zone.js:1729

which points to:

_isShown() {
  return this._menu.classList.contains(CLASS_NAME_SHOW$6);
}

Same markup works with 5.2.0.

Reduced test cases

See above

What operating system(s) are you seeing the problem on?

Windows, Android

What browser(s) are you seeing the problem on?

Chrome, Firefox

What version of Bootstrap are you using?

v5.2.1

---

Seems like https://github.com/twbs/bootstrap/commit/337068f8b1044004f4b9abfffbb433694ae87993 is to blame