Apple Health Cardio Fitness Updating
My Cardio Fitness has a couple of years of recorded data but seems to have stopped updating on June 4th this year. It last showed a reading of 17.9, which is a bit worrying, and I've been cycling, elliptical workouts (short) etc to try to improve but as the data isn't updating I cant see how I'm doing.
Any ideas why it stopped updating and why I can do about it. As far as I know nothing has been changed,
iPhone 12 Pro Max