50mpw, v12.23, LTHR zones have been consistent for the past 2 weeks with the following values:
Z1: 113-124
Z2: 125-136
Z3: 137-148
Z4: 149-161
Z5: 161+
Had a HM on Saturday of which I entered into the race calendar. Started the race to see my data screen in Zone 6 (yes - Zone 6) even though I ran it as a marathon training run. I reviewed the data after the run to see that the LTHR ranges were completely recalculated and much too low:
Z1: 84-99
Z2: 100-117
Z3: 118-133
Z4: 134-148
Z5: 148+
Disappointed to see the lower ranges and the entire race in Zone 5. Garmin still had 'Based on %LTHR', only the zone calculations got screwed up. Not sure if anyone has experienced this or has a suggested remediation. If there is a bug tied to the race calendar, I will remove the Chicago Marathon to prevent a recurrence. TIA.