I used SS to track a workout yesterday and completed it successfully by pressing the End Workout button. 46 minutes later, I opened the SS app on my iPhone to view the workout statistics, and noticed some data is missing or incorrect (see screenshot with clock time of 20:54 ): Total duration of 00:17:36 Total volume of 0 lbs Active duration of 00:01:26 Rest duration of 00:16:10 Only one exercise was recorded: Step Up , which was the first exercise I recorded; the other exercises are missing. Although, some correct data was displayed: Total energy of 620 kcal Avg HR of 113 bpm Strain of 65% Summary: “You were active for 89 minutes, and spent the most time (43 minutes) in Zone 1 (90-109 bpm).” Heart rate graph Heart rate zone chart (all the HR zone values add up to about 89 minutes) The problem appears to be intermittent: at one time, the workout statistics screen did show the correct data, then later the incorrect values reappeared. The second time I opened the SS app and viewed the workout statistics, it shows the correct values! (see screenshot with clock time of 23:02 ) The third time I opened the stats for this workout, today, it shows the incorrect data again. (see screenshot with clock time of 09:26 ) Every time I open this workout now, it shows incorrect data. I can't get it to show correct values like happened at 23:02 . I'm not certain, but I think I tracked the workout using release 715. Now I am now using release 718. The last two screenshots show this workout in the Apple Fitness and Health apps, respectively.