How to reproduce

• go to the demo :https://demo.ametys.org/nightly-intranet-cms/intranet/index.html
• Create a page and give it the title "test"
• Choose to insert a calendar service
  
• Adding a title to the service example calendar
  
• specify the type of content: news
• Choose the view: Agenda pleine page (fullcalendar)
  
• save
  The title "agenda" is displayed twice
  
  Normally, this should be the page title, I think