>>> [!note] Migrated issue <!-- Drupal.org comment --> <!-- Migrated from issue #3491739. --> Reported by: [hbrokmeier](https://www.drupal.org/user/3736246) Related to !13 >>> <h3 id="summary-problem-motivation">Problem/Motivation</h3> <p>When using the menu in vertical mode, trying to open a second submenu below an already open submenu fails. I think this is due to a timing conflict between the blur and click events.</p> <h4 id="summary-steps-reproduce">Steps to reproduce</h4> <ol> <li>Create a menu with at least two menu items with submenus.</li> <li>Add a Disclosure Menu block and change it to a vertical menu.</li> <li>Open a submenu by clicking its toggle button.</li> <li>Attempt to open a second submenu below the first one by clicking its toggle button.</li> <li>Observe that the second menu does not open.</li> </ol> <h3 id="summary-proposed-resolution">Proposed resolution</h3> <h3 id="summary-remaining-tasks">Remaining tasks</h3> <h3 id="summary-ui-changes">User interface changes</h3> <h3 id="summary-api-changes">API changes</h3> <h3 id="summary-data-model-changes">Data model changes</h3>