Garmin Fenix 8 users report problems and missing features following update 23.39

[Redaktion]

Some Garmin Fenix 8 owners report that firmware update 23.39 disables the optical heart-rate sensor, disrupting heart-rate readings, Pulse Ox, overnight HRV and, in some cases, sleep and Body Battery data. Similar complaints have emerged from Tactix 8 users, and no universal fix has been identified.

https://www.notebookcheck.net/Garmin-Fenix-8-users-report-problems-and-missing-features-following-update-23-39.1415552.0.html