there is a server
version 10.4.1.3
versionsstring 10.4.1
Edition Community
productname ownCloud
There is a shared folder. In this folder, another user has created another folder with the wrong name. The folder created by the user contains shared files.
ownCloud 10.4.1 has been released nearly 3 1/2 years ago (2020-03-30). Maybe you could try to see if the more recent version 10.12.2 doesn’t show this behavior (for example if this was a bug it could be already solved):