Mistake?

Stokfish suggests Qa6, but it also says that it's a mistake

oh yeah that seems to be a mistake by stockfish. Says c5 is better, even by score, yet it says Qa6 is better by keeping it equal..

@Emdryo wait, why does it say Qa6 is better? Here it says that Qa6 is equal and c5 better for Black. (although the extend varies depending on the search depth)

prnt.sc/p9558g
prnt.sc/p955by
@MoistvonLipwig

Ah yes, pretty much what I said. Initially says c5 is better for Black (as seen in the second, low depth search) thus thinking Qa6 missed an opportunity.
But then with more search depth it realizes that c5 only is equal too.