Hi,
Not sure if this is an intervals thing or a garmin thing. My swim workouts are in yards. I set the pool length and enter the distance in yards. When downloaded onto the watch the workout screen shows distance remaining. Distance remaining is meters rather than yards even though it’s still counting down yards.
For example the workout today was 2500 yards (see attached) but the countdown screen showed 2286 yards (). 2500 yards = 2286 meters.
I don’t recall this being an issue when I was swimming in a metric distance pool. Also, it works correctly when I create workouts in garmin connect.