Live email notifications are sent for editing of some technical pages

STEPS TO REPRODUCE

Preconditions: Mail Sending on Administration is configured. Eventually, go to

webapps\xwiki\WEB-INF\xwiki.properties

and set/un-comment

notifications.emails.live.graceTime = 1

to enable the sending of e-mails after 1 minute.

1. Create a new instance
2. Login as Admin
3. Create an user (e.g. U1)
4. Login as U1
5. Go to Notification Settings, set Pages toggles to ON and set Email Frequency to Live
6. Login as Admin
7. Go to Administer Wiki > Mail > Mail Sending and fill the configuration
8. Check the U1's email inbox

EXPECTED RESULTS

No email notifications are received by the user.

ACTUAL RESULTS

An email notification is received for http://localhost:8080/xwiki/bin/view/Mail/MailConfig page, containing modifications done by Admin.

I've noticed that there are also some email notifications received for editing by Admin of other pages as well, for example http://localhost:8080/xwiki/bin/view/XWiki/SearchConfig, this might have been after an instance restart (if relevant).

The email notifications for these pages seems to be sent only for Live setting.

The issue could not be reproduced on XWiki 12.6.1.