How do reminders work?

How do alarms work? I created a To Do note, set an alarm for 2 minutes. I can see that next to the little click icon there is a date and time setup.

When the time is reached nothing happens. The date and time disappear from the note but I don’t see any window or notification pop up.

I have tried this 3 or 4 times and nothing happens.

I am on Windows 10 with 1.0.169

It’s possible there’s a bug. In the next version, the alarm system for Windows has been upgraded so should work better.