bug(LiveAnnouncer): Repeated message is not announced

[eitak]

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

LiveAnnouncer does not announce a message when it is the same as the last announced message
(using MacOS VoiceOver + Chrome).

Reproduction

Using MacOS VoiceOver + Chrome

StackBlitz link: https://stackblitz.com/edit/components-issue-1j77ug?file=src%2Fapp%2Fexample-component.ts

Steps to reproduce:

1. Turn on VoiceOver
2. Open StackBlitz link
3. Click "Announce Hello" button
   -> VoiceOver announces "Hello"
4. Click "Announce Hello" button again
   -> Expected: VoiceOver announces "Hello"
   -> Actual: No announcement

Expected Behavior

VoiceOver announces the message.

Actual Behavior

VoiceOver did not announce the message.

Environment

• Angular: 16.1.8
• CDK/Material: 16.1.7
• Browser(s): Chrome
• Operating System (e.g. Windows, macOS, Ubuntu): macOS

[amysorto]

I am unable to reproduce this on my end when testing so I will be closing this issue.

If you still run into this problem, please create a new issue with a video and add your chrome and macOS versions to help debug further.

[angular-automatic-lock-bot]

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