TYPO3 Core

There seems to be a bug, when a non-admin user edits the page properties of the root page if there is more than one language.

Error message when trying to save root page properties (on all languages):

1: Attempt to modify record 'title of page' (pages:36) without permission. Or non-existing page.

Page with ID 36 is the translation of the page with id 1.

All other pages can be edited.

To reproduce:

• Multiple languages
• One backend user group, DB mount set to root page (1)
• One backend user, no admin user, assigned to this group
• Access to all pages set correctly in access module
• Open page properties of root page (wether default language or any translation of it) and try to save --> error

This error does only appear on the root page. All other pages are OK.
The permissions in the database seems to be correct.

Permissions in database seem to be correct (same for all pages):

perms_userid = 1 || perms_groupid = 1 || perms_user = 31 || perms_group = 27 || perms_everybody = 0

TYPO3 version: 9.5.5
PHP 7.2