Alarm clock color does not change synchronously

In the “Timeline” the reminder is titled “Completed”, the orange alarm in the notes is not synchronized to gray

macOS 10.15.7
Agenda 14.1.1

After rescheduling reminders that have expired in the timeline, the alarm clock in the notes remains red

macOS 10.15.7
议程 14.1.1

Thanks, we’ll verify. Please note that Apple has made many changes in the calendar frameworks between macOS 10.15 and by now macOS 12, so this might be related to being on an older system.

Are you sure it works in macOS 12 ?