I use the new Urgent reminder alarms all the time. A reminder with a time, Urgent toggled on, and you get a real full-screen alarm. That part works great. What does not work is stopping it with my voice.
When a Clock alarm goes off I just say "Hey Siri, stop" and it stops. Always has. But when an Urgent Reminders alarm is ringing, "Hey Siri, stop" gets me "There's nothing to stop." Same with "stop the alarm" and "stop the reminder alarm." Siri hears me fine, it just does not see the ringing alarm as something stoppable. The only way to shut it up is to get up and slide to stop.
Steps to reproduce:
1. Settings > Apps > Reminders > Alarms on
2. Create a timed reminder and toggle it Urgent
3. When the alarm starts ringing, say "Hey Siri, stop"
Expected: it silences whatever alarm is ringing, like it already does for Clock alarms.
Actual: "There's nothing to stop" and the alarm keeps going. 100% reproducible, every time.
This looks like the same bug as the old timer one (thread 255942681: timer alarm is ringing, you say stop, Siri says there is nothing to stop). My guess is the stop command only looks at alarms owned by the Clock app. Urgent reminder alarms are AlarmKit alarms owned by Reminders, so they never make it onto the list, same as ringing timers.
I already filed this through Feedback Assistant. If you are hitting it too, reply here or file your own feedback so Apple can see the scope. The whole point of the feature is alerts you cannot ignore when your hands are full or the phone is across the room... it defeats that if you also cannot stop it hands-free once you have heard it.
