Steps to reproduce:

1. Install clean installation of Ibexa DXP  
2. Configure "admin only" and "content" field groups
3. Edit "folder" content type, and add "test protected" (text line) field to "admin only" field group 
4. Add new language, e.g. French (fre-FR)
5. Add editor user and set Content/Edit policy with Field Group: content limitation
6. As admin, create new "folder" in english language, with "test protected"="test eng"
7. As admin, add new translation for this folder, and set "test protected" field = "test translated"
8. As editor user, edit same folder and chose the French translation
9. As editor, change not restricted fields (e.g name) and try to save draft or publish

Result:

Access denied (attached screenshot)

Expected result:

Content is published correctly