I just talked with MS support, and we tried several things including resetting the phone and band, but nothing fixed the problem. He is forwarding to the developers for review. Unfortunately, due to my schedule, they are not calling me back until Monday evening, so it may be worthwhile for others to report the issue, as well.
As a side note, the one thing we did not do is delete and reinstall the MS Health app. Even though the data is synced to the cloud, reinstalling may result in past data no longer being displayed. Again, the data is still in the cloud, just not displayed in the app.