Renaming level 3 (and higher) pages moves them to a wrong (automatically created) parent page

STEPS TO REPRODUCE:

1. Login as Admin
2. Create a document with 3 levels (Pag1.Pag2.Pag3/) (all pages must be created)
3. Click on 'Move / Rename' on 'Pag3'
4. Fill in the new title (e.g. 'Pag4')
5. Click 'Rename'

EXPECTED RESULTS

The page Pag3 (Pag1.Pag2.Pag3) is renamed successfully to Pag4 (Pag1.Pag2.Pag4).

ACTUAL RESULTS

The page Pag3 is renamed to Pag4, but is moved under a new (automatically created) parent page named 'Pag1/Pag2', instead on keeping its original location (which was not changed) Pag1.Pag2.Pag4.

The issue could not be reproduced on XWiki 10.11.2.