[Bug]: Toolbar submenu does not close when another submenu opens

[miroslavstastny]

Library

React Northstar / v0 (@fluentui/react-northstar)

System Info

React 17

Are you reporting Accessibility issue?

no

Reproduction

https://codesandbox.io/s/toolbar-submenu-react17-r2lk9v?file=/example.js

Bug Description

Have a Toolbar with a menu which contains multiple submenus.
Open first submenu, then open the second submenu without closing the previous one.

Actual Behavior

The first submenu remains open.

Expected Behavior

The first submenu closes.

Logs

No response

Requested priority

High

Products/sites affected

No response

Are you willing to submit a PR to fix?

no

Validations

• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• The provided reproduction is a minimal reproducible example of the bug.