Unicode Errors result in always re-download

[sn00py1310]

There seems to be a bug with Unicode detecting the same filename on the disk and the server differently.
So it re-downloads the whole file every time.

  Added 'Übungsmaterial/Folien_Übung2.pdf'
  Deleted 'Übungsmaterial/Folien_Übung2.pdf'

Exact copied output.
You can see it here https://www.soscisurvey.de/tools/view-chars.php

Redownload is on default
OS: Windows 10
Version: PFERD 3.4.3

[Garmelon]

Sounds like the file name is not unicode normalized on ilias, but at some point after downloading the file it is unicode normalized to NFC/NFKC. What file system are you running this on?

[sn00py1310]

After further research, I could pinpoint the root cause of the issue.
It's a combination of PFERD, ILIAS and synchronization tools. A lot of the tools for synchronization normalize the file-/foldernames. In my case, it's syncthing.
There isn't probably a good solution in PFERD for this type of issue.

[Garmelon]

A setting (disabled by default) to normalize paths before applying transforms could maybe fix this.