Sometimes I mtb in pretty vertical areas - such that I have to push. The time and some mileage show up, but on 'rides' when i push a lot, my unit shows an inordinate amount of stopped time. Also mileage is shorter. I run a redundant tracker on my phone - RideWithGPS. They're often different, but consistently within ~10%. But on
days with lots of hike-a-bike I get a lot more stopped time.
FWIW, I use a wheel sensor and I push, not carry.
Thanks