The Bug

With the introduction of new fish, dolphin, squid & glow squid spawning mechanics this has led to spawners of those entities only being able to spawn those entities at certain heights. For fishes, dolphins & squids those spawners only work between height y=50 & y=64 while glow squid spawners only work below y=30

Reproduce

• Go to a body between y=50 & y=64
• Do

  /setblock ~ ~ ~ spawner{SpawnData:{entity:{id: "minecraft:pufferfish"}}}
  

  Notice the pufferfish spawn

• Run the same command in a body of water above y=64 or below=50
  Notice nothing happen

Expected Result

Spawners wouldn't be height dependent when spawning mobs

Note

Tropical Fish spawners in lush caves are unaffected by this