Health App Step Data Disappearing
I use the Health App to keep track of daily steps. It will keep track during the day, but the next day, all the previous day's data will disappear. This data syncs with MyFitnessPal and it remains in that app, but disappears from Health. I've rebooted hard closed the app, rebooted and hard reset the device, to no avail. I'd rather avoid restoring if possible. Any ideas?
iPhone 6s, iOS 9.2.1