Since the last Software Update to version 5.10 (around beginning of November 2020) my Garmin Vivoactive 4 has stopped tracking Intensity Minutes.
I have tried my best to scroll though all options/settings to see if I have accidentally disabled this feature but to no avail. I have also done two factory resets and reset my heart rates zones and still this hasn't resolved the issue.
Hoping someone out there has experienced the same issue and found a solution.