Lock is not working for ConfigurableClass when the page is under a nested space

Replication steps:

• Login as admin
• Create a document xwiki:Foo.Bar.WebHome
• Edit in wiki mode this document, add the following snippet and save:

  {{velocity}}
  #set($lock = $doc.getDocument().getLock($xcontext.getContext()))
  Locked by $lock.getUserName()
  {{/velocity}}
  

• Edit the same document with class editor to add a String property named String and save
• Edit the same document with object editor to add:
  • a Foo.Bar.WebHome object
  • a XWiki.ConfigurableClass object with the following properties:
    • displayInSection: Custom Foo Section
    • configurationClass: Foo.Bar.WebHome
    • configureGlobally: checked
• Save and view the page
• Open the admin in another tab, click on "Other" section, and open "Custom Foo Section"
• Back on the previous tab, reload Foo.Bar.WebHome

Expected result:

• The page should display: Locked by XWiki.Admin

Obtained result

• The page display: Locked by $lock.getUserName()

Note that the bug doesn't reproduce if you use Foo.WebHome instead of Foo.Bar.WebHome