Occasionally my Fenix 6 sapphire, in beta program, says after an easy run that it has detected a new max HR. This value is usually 10+ bpm higher than reality. There is no option to reject it. My training zones, that are personally configured from lactate / HR testing in a lab on a treadmill, are then overwritten with this nonsense. Any suggestions other than typing everything in again to Garmin connect and then going through the sometimes it works sometimes it doesn't synchronising effort?