health app steps wrong: way too low

my health app starting not logging steps a couple of days ago. I have a different app that shows time, and the health app shows steps, both apps show the same amount of calories burned, but after walking for over 3 hours health says I had 380 steps. It was I burned over 1200 calories, but with only 380 steps for the entire day. This was happening yesterday too. Not sure what changed or why it is doing this.