The AUAudioUnit in my app uses the user presets system that was introduced with iPadOS/iOS 13. The user presets system worked well in iPadOS 13, and it worked in at least one of the pre-release beta versions of iPadOS 14. However, it has not worked since iPadOS 14.0 was released. The problem is (superficially, at least) that: saveUserPreset no longer writes preset files to the app's Documents folder, but the method doesn't fail either. The userPresets array, which typically contains the presets that were deserialised from the files stored in the Documents folder, is invariably empty. The presets that the array would contain prior to upgrading from iPadOS 13 are no longer accessible. In other words, prior to upgrading to iPadOS 14, my app could save user presets using the saveUserPreset method and subsequently access their contents from the userPresets array. Since upgrading to iPadOS 14, the userPresets array is invariably empty and the saveUserPreset method no longer saves presets to the Documents folder. Has anyone else experienced this problem?