So after the recent update now faces with HR that previously were working just show zero. This is on both Wear watches I have and on my S3. And yes, HR is working for native faces and for other apps I design for so it’s not an issue with a permission, watches etc. I was even asked to give permission to facer to access sensors after I tried a reset of one of my watches and reinstall of the app which I did and still does’t work. I do see the sensor fire for a few seconds every so often on the watches but it’s almost like the checks are timing out prior to the watches entering ambient state.