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BUG in antichess computer analysis

Hi,

I have played the following game: lichess.org/aMPtagEb/white#2

Right from the first move of black lichess believes that we have a mate in #23. Now if you start playing the suggested moves:
Ba6, bxa6
a3, Bxa3
Nxa3, a5
b4, axb4
Nh3, bxa3
Rxa3, Nc6

At this point lichess indicates a mate in #16, but after playing the suggested move (Rxa6) now the game became completely even, no forced mate anymore.

This is not the first time it happened although the first what I can demonstrate. In the past I have found games in which the recommended move suddenly creates a forced win or lose from a completely balanced game.

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