Editor is not loaded when adding object of an existing type using link

Reproduction steps:

• Create a new page
• Add a WikiMacroParameterClass object using the object editor and Save & view
• Return to the object editor and click on the link "New WikiMacroParameterClass object"

Expected result:

• the form for the object is displayed and the editor is properly loaded

Obtained result:

• the form for the object is displayed but the editor is not properly loaded: