Mob Spawner farms (In my case zombies)

Mob Spawner farms that use the drop method no longer work, after update aquatic. Due to a change in water physics mobd no longer auto-swim up the pattern of sign-waterblock-sign-waterblock... Please revert this change! The flowing water used to connect to the still block of water, and mobs would auto-swim up to a certain point before dropping and getting to a one hit kill, but since they no longer swim up Automatically, this type of farm is completely ruined... Please let mobs Auto swim up water again...