Yesterday's update (version 15.74) broke the snowboard activity on my Epix Pro, and possibly skiing too.
I live in the Alps and snowboard frequently, there was a definite change in behavior from the previous version to this.
Auto run does not pick up the start of a run anymore, today was the first time running with the new software version and the activity missed my first two runs (zero distance, zero elevation, zero everything), then I realized and managed to somehow make it work by pausing it and resuming it manually at the beginning of each subsequent run (at the top of the lift).
Later, when viewing the activity on the Connect app, the new Run/Lift highlights on the map are completely bogus, some (portions of) runs are highlighted as lifts and viceversa.
There is a changelog entry that mentions changes to the activity ("Added tracking of splits for Ski."), but it may have introduced a bug instead. Have done a soft reset and will try again in the next days.