bug(CdkMenuItem): Main menu closes after clicking on a menu item that is a menu

[Xylios13]

Is this a regression?

• Yes, this behavior used to work in the previous version

The previous version in which this bug was not present was

No response

Description

Clicking on a menu item that is also a menu will close the whole menu, instead of closing only the opened submenu.

Reproduction

StackBlitz link: https://stackblitz.com/edit/4aortd
Steps to reproduce:

1. Click on File button
2. Click on New menu item

Expected Behavior

The submenu for the New menu item is closed (or kept open), the menu associated with File is kept open (like a CdkMenuBar or the menu nested example: https://material.angular.io/components/menu/examples#menu-nested)

Actual Behavior

The submenu for the New menu item is closed and the File menu is closed as well.

Environment

• Angular: 19.0.0
• CDK/Material: 19.0.0
• Browser(s): 131.0.6778.70 (Official Build) (64-bit)
• Operating System (e.g. Windows, macOS, Ubuntu): Windows 10 Pro