For some reason since iOS 26.5, a ControlWidgetButton or a Button in a widget configured with an AppIntent conforming to OpenIntent fails to receive its AppEnum parameter correctly if the intent and enum are defined inside a shared Swift Package.
Tapping the control widget button opens the main application, but it doesn't pass the AppEnum parameter value in, leaving the app on its default screen instead of navigating to the intended view. This was working perfectly in iOS 26.4, where the app would launch and receive the correct enum case from the intent. No code, configuration, or scheme changes were made between the two runs, only the simulator/OS version differs.
Has anyone else run into what seems to be a regression on iOS 26.5?
I filed feedback with a sample project: FB22848510