strange book in the nodes 16:1 challange

I wondered how is it possible that stockfish 16 seconds lost against 1 second and it seems based on the evaluations that it was a book win.

game started:

[pgn]1. b3 a5 2. Bb2 a4 3. Nc3 a3 4. Bc1 Nf6 5. Nb1 d5 6. c3 e5 7. b4 c5 8. Bxa3 cxb4 9. cxb4  0-1
[/pgn]

The evaluation for 9.cxb4 is
-2.74/28 69s

Indeed, a bad opening line.