They have these on a college campus nearby. I once watched one of these things try to get from a walkway onto a road after a delivery.

It didn’t just backtrack the way it came. It was looking for a sloping ramp, but the sidewalk ledge was too high for its tiny wheels. It kept going back and forth, retracing the same paths over and over, failing, then returning to the original location, turning around and doing the whole thing again. I stopped paying attention after 15 minutes of this.

It was like watching a drunk come out of a bar and stumble around trying to find his parked car.