I found this on the apple site:
"If a reminder coincides with an event in your calendar, like a meeting, if you're moving or exercising, or if you start a session on your own, your Apple Watch reschedules your reminder. You’ll get the reminder a short time after your event is over or you stop moving."
Here is the link:
https://support.apple.com/en-us/HT206999
Could this be why we're not getting reminders? This makes it sound like if you have ANY event in your calendar or you aren't sedentary, you won't receive the reminder. That seems crazy to me since I thought the purpose was to remind you to stop and take a break to breathe. Why do I care if I'm completely sedentary or sleeping??? And I have events on my calendar all day every day-like many people do! If this is a new thing, I hope they change it back to how it was.