Puzzle with multiple solutions

I just discovered a puzzle in which there are actually 2 correct solutions, of which only one is correct according to the computer. In puzzle #boBqE the starting position is as follows:
White: Ka4, a5, b5
Black: Ke5, Bb7, d7, d6
After 1.a6 Bc8 2.Ka5 d5, the solution of the puzzle is 3.Kb6 (which was my choice, luckily). According to the tablebase, 3.b6 wins as well. However, Lichess claims that 3.b6 is wrong. I think this puzzle should be removed from the database immediately. I did give it a thumbs down, but I don't think they will remove it after one thumbs down, do they?

The "book icon" on lichess (which I thought shows tablebase results) says Kb6 wins and b6 and a7 draw. Where did you find the information that b6 wins?

Ah, never mind, apparently I played a different line when analysing the position.

Ah, thanks. I peeked at the Stockfish lines after b6 and couldn't see where could it possibly be wrong. (Which doesn't mean anything, of course.)