Some AUv3 effects doesn’t work since upgrade to iPadOS 15
Load the effect plugin into an insert slot of a track. The UI of the plugin is black after it is loaded and the effect does not change the sound.
Do scenario A, then disable the affected plugin. Quit Cubasis and start it again. Tap on the disabled plugin. Then the UI shows up properly. Enable the plugin and the UI goes black. Here a demo of this behavior: Cubasis 3.3 bug with iPadOS 15 - YouTube
Rebooting the iPad did not change this behavior. Happens also on newly created projects.
So far this affects the AU effects Brambos Perforator and FAC Envolver. Both plugins work properly in other AU hosts, tested with AUM and apeMatrix.
3. Expected Results
The plugin shows its UI and works properly
4. Actual Results
The plugin UI is not displayed and the sound is not changed → plugin is not working.
iPad Pro 2021, 11 inch, 256 GB, iPadOS 15.0, Cubasis 3.3.1