‘Resume later’ means that (a) you don’t get caught out by the watch deciding that you’ve finished your activity and autosaving it (after about half an hour, I think), (b) battery usage is reduced compared to just leaving it paused, and (c) you can use the other functions of the watch without tripping over the current activity. It sounds like maybe yours might have flubbed while trying to autosave and got confused about whether the activity was still ongoing or not.
2 Likes