Crazyhouse opening — mate in 12?

The Lichess analysis board gives mate in 12 for crazyhouse after this opening:

1. e4 Nf6 2. e5 Ne4 3. e6

Is this actually mate in 12? How does the line continue? All I see is:

... fxe6 4. Qh5+ g6 5. Qe5 c6 6. Nc3 Qa5 7. Qxa5 Nxf2 8. Qg5

After this I don't get a mate score.

I only see a mate score if I have a single line in the options on the analysis board, and it goes away as soon as I make 3... fxe6. If I have multiple lines set to display, the mate score doesn't appear. Weird.

Seems like it's pulling the #12 from the opening book rather than an actual analysis.