They can see your location but you can’t see theirs

My significant other was out of town in Detroit, MI . I went to check his location and it came up. I could see he was in a car going somewhere and all of a sudden his location disappeared for an hour, but he could still see mine. He claims that it was because of the area in Detroit that he was in? Is it possible for this to happened? And our later I got a message that he started sharing his location with me.