Health app on iPhone showing odd false distances
Since upgrading to iOS 12, and continuing with iOS 12.0.1, the Health app has been showing bogus distance reports of a series of short distances even when the iPhone is still (e.g. when I am asleep). The image shows what is going on.
This never happened before iOS 12. It happened the day after I upgraded, and then everything was normal for about a week, and then the problem returned.
The Health app is only pulling data from the iPhone. I don't have an Apple Watch. No other devices are reporting distance traveled.
Short of restoring the iPhone to factory settings, any other suggestions?
iPhone 6s, iOS 12.0.1