Scheduling problem

[Sonorama]

Cordova version: 6.4.0
Plugin version: 0.8.4.1
Device: iOS 10.2.1

I'm running a demo app: https://github.com/Telerik-Verified-Plugins/LocalNotification-DemoApp

All notifications seem to be scheduled because they return their IDs. However, none of them triggers except #5 which has recurrence set to every minute. #5 seems to fail at the initial trigger, but the subsequent recurrence works. I tried different mixes of Cordova and Plugin versions, but came out with the same result. Has any of you figured out what the problem (better yet, solution) is?