A wiki component based listener does not receive DocumentCreatingEvent when a user page is created

I have a weird behavior on XWiki 10.11.9. I implemented an event listener on a wiki page, the listener listen to the event DocumentCreatingEvent.
Apparently when a user page is created the DocumentCreatingEvent is not fired.

Steps to reproduce :

• Create an event listener on a wiki page, as explained on the documentation.
  • Create a page
  • Add a XWiki.ComponentClass XObject in it
    • Component Role Type: org.xwiki.observation.EventListener
    • Component Role Hint: mytestlistenr
    • Component Scope: Current Wiki
  • Add a XWiki.ComponentMethodClass XObject for implementing the getEvents() method:
    • Method Name: getEvents
    • Method body code:

      {{groovy}}
      import org.xwiki.bridge.event.*
      
      xcontext.method.output.value = [new DocumentCreatingEvent()]
      {{/groovy}}
      

  • Add another XWiki.ComponentMethodClass XObject for implementing the getName() method:
    • Method Name: getName
    • Method body code:

      {{groovy}}
      xcontext.method.output.value = "mytestlistenr"
      {{/groovy}}
      

  • Add another XWiki.ComponentMethodClass XObject for implementing the onEvent() method:
    • Method Name: onEvent
    • Method body

      {{groovy}}
      def logger = services.logging.getLogger('XWiki.Notifications.Code.UserNotificationsConfigurationListener')
      def document = xcontext.method.input.get(1)
      
      logger.warn("Creating document : {}", document);
      {{/groovy}}
      

• Create a test page and check the logs, you will see that a warning is displayed on the logs, something like : 'Creating document : ...'
• Go to the wiki administration, and on the users section create a new user, and observe the logs :
  • Actual result : nothing is displayed on the logs
  • Expected result : a new warning message is added to the logs, something like "Creating document : xxx" (xxx is the created user page reference)

Note that I have the same issus concerning the DocumentCreatedEvent event.