User selector isn't correctly displayed in a subwiki when selecting a main wiki user

To reproduce:

• Create a subwiki (open to main wiki users)
• Create an AWM in this subwiki containing a user picker
• Create a page in this AWM and add first a main wiki user
• Save the page, and then click on edit
• Observe that the user picker is displaying the reference to the user profile page, not the user name and its profile picture. See the attached screenshot for more detail.