Hill session question

I did my first hill repeats session today. I used the interval workout created by the app that pushed to the “workout” app on my Apple Watch Ultra. I followed the instructions, hit the button to start a new interval when it needed it (base of the hill after the easy jog back down). When I finished my workout, it recorded the entire 6.8 or so miles, but it had my start and stop sections as only the 1.5 mile warmup. Everything after that wasn’t reflected in the map OR in the elevation grid. The distance and heart rate were recorded, though.

Any thoughts? I can upload screenshots if helpful.