The "Time in Heart Rate Zones" has started showing completely spurious and incorrect information. It nearly always shows some activity in Zone 1, but no activity in the other zones. The total % (summing up zones 1 to 5) is rarely higher than 30%. The heart rate data itself is correct, it's just the "time in zones" that is wrong. Looking back through my history of activities the problem started on 25th April. Prior to that date the "time in zones" it shows accurate information.
Anyone else experienced this?