FIle Drop - Nextcloud 15

Hello everyone,

I am facing the problem with a fresh installation of Nextcloud 15, that the file drop (anonymous upload) works, but it doesn’t show the files on the page a user has uploaded. It states “Uploaded files:” (in german “Hochgeladene Dateien:” but the list is empty.
Is this a bug or a misconfiguration?

The system is:
Ubuntu 18.04 LTS
PHP 7.2

I tested it with several browsers.
On an installation, which was upgraded from 14 the function still works as expected.
Does someone have any suggestions?

Kind regards
Rolf Bähr