Has anyone called Garmin Customer Service to report this?
U.S. toll-free: 1-800-800-1020
Same issue here since yesterday evening....
For those who still have Garmin Training Center, you can use it to update workouts on your device
Got a mail from Garmin customer service. They are aware of the custom HR and watt zone errors. They are working on it, but do currently do not have a planned completion date.
Please note, that workouts can be configured manually on most devices.