SDK 8.3.0, 8.4.0, fr955, fr965: in the simulator DataFieldAlert.onUpdate is called every second, even though on a real device (fr965, FW: 26.08) it's only called once when the alert is shown.
This space is specifically for Connect IQ bug reports. Please review the Connect IQ Bug Reports FAQ before reporting a bug to be sure you have the information needed for Garmin to investigate the bug you wish to report.