I have just started to have this issue in the last two days with data recorded on Edge 530. HR data shows up in Garmin Connect but not the time spent in HR zones. I have not made any changes to settings, etc. in the last couple of days that could explain this. The same issue is also showing on Garmin Connect Android app. All other data is displaying correctly.
Looking at the (now empty) Time in Zones graphs in Garmin Connect, all the HR set zones are incorrect (see attached), even though they have been correctly set up and showing as such in Garmin Connect. I have had no issues with this since I first got the Edge a year or so back.
Can anyone suggest a possible fix for this.
Many thanks in advance.