I swim regulary with my Forerunner 255 Music, and doing drill workouts.
I know some stats are not calculated due to the fact that the movement is not known by the clock if not using any of the 4 regular swim types. (But I think it should be if we have pulse data, so I don't know why it is not implemented)
However it is strange that after I save the workout I can see paces for each interval, but as a summary the average moving pace is 0:00min/100m.
My average pace and best pace is 0:00 min / 100m as well.
Is it a normal behaviour? It is transferred correctly to Strava, but not in GC.