Multi day activity

Just came off a 3 day backpacking, I used the Hike activity and clicked on Resume Later for each day. So, my question, is it intentional or a bug when you keep clicking Resume Later it doesn't update your sleep, stress, or training status? I'm assuming possibly that the hardware isn't capable of measuring other stats while keeping the activity in the background. When it was under Resume, my watch would randomly tell me I'm on/off course, which it shouldn't do unless it's running in the background constantly. Any help would be appreciated!