Activity Streams doesn't handle well subwikis

Real life use case:

• Vincent modified the page named "Roadmap" located in the manager subwiki
• Vincent modified the page named "Roadmap" located in the main wiki
• Sergiu modified the page named "Roadmap" located in the enterprise subwiki

The AS will show all those as a single change for the page named "Roadmap", as shown in the attached screenshot. Notice that the title displayed is "XWiki Enteprise Manager Roadmap". This is not correct and there should be 3 separate changes since the pages are not the same. They happen to have the same name but on different wikis...