Probably many Garmin Fenix 6 users already know that if you do a firmware rollback on the watch to a version below 20.30, then Garmin Pay on the watch stops working. However, if the watch was originally installed with any stock firmware, Garmin Pay will work on the old firmware. Because of this bug you can not easily rollback to the firmware 19.20, in which the barometer and altimeter are working as it should. The rollback itself is technically easy, but Garmin Pay doesn't work after the rollback. This problem has been confirmed to me by many Fenix 6 owners.
Dear developers Garmin, please let me know how you can rollback to the firmware 19.20, so it does not "fall off" Garmin Pay?