1. In your OS, create a new folder named "test" and add some images into it
2. Open QDS and go to Content Library
3. Add the "test" folder as a custom user folder --> Folder "TEST" is seen in QDS with the images
4. In your OS, go to the location of the "test" folder and change it name to "testing" or something else.
5. Go back to QDS -> Folder "TEST" is still seen in the QDS with the images, but user cannot use the images in the project.

Expected result: Folder has changed to "TESTING" and it has the images inside it and user can use them.

I think it would be better, if user changes the name of the folder, QDS also updates the name or gives some kind of indication, that the folder properties has been changed.