My kid has their new FR255S and has used it for their first couple of runs. While the HR data seems to be being captured fine the HR Zone information at the end of the run is missing (or at least on a 37 minute run only 0.02 minutes is tagged). I'm familiar enough with the Garmin eco-system as I have an Epix 2 (and previously a FR645M and Fenix 6) and I can't see anything obviously wrong in the settings. There is a max-hr set (198bpm), a resting hr set (70 bpm) and the HR Zones are all set to default based on %Max HR.
Any thoughts or suggestions on what could be the cause?
