Puzzle defect, verified with engine

I want to report an error in the training puzzle #45543. It fails the user for the solution Bb7+ Qg2 Bxg2+, which is the start of a forced mate sequence (mate in 4). I think this should return "Good move (but you can do better)" (since Nh3+ mates one move faster), rather than "Puzzle failed".

en.lichess.org/training/45543

Cheers

Engine verifies that mate in 3 is better than mate in 4 by one move.