Close button from the Popup block is missing a title

[rodica-andronache]

Description

Step-by-step reproduction instructions

1. Add a Popup block
2. Add a Close button to it
3. check the page using https://pagespeed.web.dev/ -> an accessibility issue is shown about the close button

Screenshots, screen recording, code snippet or Help Scout ticket

https://secure.helpscout.net/conversation/3130832256/475624

Environment info

No response

Is the issue you are reporting a regression

No