Context help doesn't work (anymore?) for QML singals

Steps to reproduce:

• create a new qml project
• add the following code:

      Text {
          onLineLaidOut: console.log("Check context help")
      }
  

• set te cursor on onLineLaidOut and press F1
• instead to show me the documentation for lineLaidOut signal, I'm getting onLineLaidOut No documentation available