With this snapshot, we're fixing two well-known exploits that are widely used in the community: 0-tick farms and AFK fish farms. 0-tick setups will no longer make crops grow faster and fishing contraptions will no longer give treasure loot.
I want to highlight at this point that we're not removing these options for players because they're farms - they're being removed because the ratio of effort to reward is out of balance for these contraptions in particular. This is also why fish farms will continue to work - they just will not produce end-game level loot. If you really like an endless stream of sushi, that is still easily available.
I know there's a popular view that Mojang dislikes farms and automation - this is not true. What is important to us is that the game remains balanced a