Qt Creator does not recognize Android Installation

I want to build an app with Qt 5.15.0 on Android. So far, there have been no problems. After a complete reinstallation of Qt, QtCreator can no longer find the Android files.

This affects at least QtCreator versions 10.0.0 and 9.0.1.

Reproduction:

• Download tools via Online Installer: Qt 5.15.0 incl. Android + QtCreator
• Install JDK 1.8 (version 8 required for 5.15).
• In QtCreator > Preferences > Devices > Android > Set Up SDK -> The files were downloaded, but an error message appears stating that Command Line Tools (latest) is missing. This error is described here: https://bugreports.qt.io/browse/QTCREATORBUG-29026
• After I changed the sdk_definitions.json from "cmdline-tools;latest" to "cmdline-tools;8.0", all packages are downloaded by QtCreator.
  BUT: No kit is created, and the settings are not retained. After restarting QtCreator, it can no longer find the Android setup.

If I download the Android files via Android Studio QtCreator also doesn't find the files.