The cycling workouts in SYSTM have a very useful feature - the dual toggle for “music” and “sound effects” allows to watch movies during cycling workouts by toggling music off and leaving sound effects on.
Unfortunately, the “music” setting gets carried over to the general “sound” setting in the strength workouts (and presumably other non-cycling workout types), which rely on sound cues to mark the start and the end of each exercise.
Therefore, toggling the “music” setting off in a cycling workout makes it necessary to undo the setting in a strength workout (and vice versa if you want to watch a movie during the next cycling workout).
I think it would make more sense to save the sound settings separately for cycling and strength workouts to avoid messing with the sound toggles before each workout.