Since beginning of April Garmin Connect seems to place HR data into the wrong Zone for my cycling activities. The data is correctly captured and the average HR and max HR are correctly shown on the ride overview, however when looking at the HR Zones display it is under reporting the zones by a large margin. For example it shows 90% of activity in Zone 3 with the remainder in Zone 2 and 1, but when analyzing ride data it can be seen that the cycling included efforts of 40% at zone four and 5% in Zone 5.
Looking back at rides in March it appears that zones were correctly reported by Garmin Connect at that time and previous to that.... did something break in a recent update?