When I set an alarm using the AlarmKit Demo App provided by WWDC, wait for the alarm to go off while the device is unlocked, and the Dynamic Island pops up with a notification, instead of tapping the button to dismiss it, I collapsed the Dynamic Island. The Dynamic Island displayed a black blank screen; when I long-pressed to expand it, it still showed a black blank screen. When I tapped it while collapsed, it redirected me to the Demo App, and this state persisted indefinitely. The issue was only resolved by turning off the device or setting a new alarm and waiting for it to go off, then explicitly tapping to dismiss it. Additionally, I’m currently developing my own AlarmKit-based alarm app, which is how I discovered this bug. Now that I’ve found the official demo has the same issue, I look forward to a fix.
Xcode version 26.5 (17F42) macOS version 26.5 (25F71) Simulator version 26.4.1 Device version 26.5.1
Demo App link： https://docs-assets.developer.apple.com/published/c2045ce0bff8/SchedulingAnAlarmWithAlarmKit.zip