Several things.

Only 4 games left in season, anyway, so McVay chose to go with Havrisik.

Crosby was taking up a valuable roster spot so he was a victim of the numbers game.

It’s possible, if not probable that Crosby disappointed in practice after his signing.

Havrisik has another 4 games to fully redeem himself and remain the PK for 2024. If not, they simply start a new search. The die is cast.