[daemonologist]

I scratched my head for a while trying to find a configuration where the ball traversed that Y piece intuitively (entered the curve from the west, was reversed, and then exited the straight to the north) before giving up and trying the same "impossible" solution.

Maybe it's a tie-in to their presentation - perhaps they have a new model like Sora which has a poor understanding of physics. (This would explain why the ball starts flat and ends going uphill as well.)