wrong permission on CIFS (Windows) filesystem when creating a folder

No idea when this started, but recently I cannot create a normal folder under a remote share running Windows Server.

What actually happens when I go to that remote machine and create a new folder, with or without content, all other users see this folder as empty. Only me can enter that folder and manipulate the files contained therein. On Windows clients, it shows a lack of 'listing' permissions. When entering the folder, it looks empty.
I do consider this to be a bug, at least for the time being, because when I create that folder on the command line by entering the parent folder and typing mkdir testo, directory testo is created, and all files copied into there using Dolphin show up to all users.
The problem, it seems, lie in the creation phase of that folder.