The analysis engine in the new Lichess app has given me some problems. However, restarting the app and checking the same analysis always fixes it for me.

edit: Actually, nevermind. That analysis is truly borked. You should report it, so the team can have a look.

edit2: Gods! it’s well and truly goofed. It isn’t even this game. You can just go to the analysis tool and play: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5, and it switches to #1.