Regression: New-translated-folder under non-translated folder won't store selected locale

Reproduction:

1. Create anywhere under /content/documents a new non-translated folder
2. Open its context menu, use the option "Edit allowed content"
3. In the "Edit allowed content" dialog, choose the "Add new translated folder ..." to enable user to create translated folder as a child node of non-translated folder.
4. Create new translated folder and in the new-translated-folder dialog, choose a language.
5. The folder is created, but the language is not set, instead a yellow-warning icon appear.

Prior to CMS 2.24.04 this worked as expected.