I noticed this week that two of my swim workouts have not recorded moving time and instead show my total time as moving time. Here are two screenshots: in the first shot from Monday of this week my pace is calculated based upon my moving time in the water and that moving time is displayed. In the second screenshot the total time and the moving time are the same/off by only a few seconds. I can assure you that I was swimming intervals and that my moving time was around 57:25.
Also of note, the session chart from the first screenshot shows my pace on the graph alongside heart rate while my session chart of the second screenshot only shows heart rate. Both files were taken from Garmin which shows a total and moving time for both activities as well as pace charts for both.