Ghast spawn too frequently in 1.16.0.61 update

Ghasts are spawning way too many in any nether biomes just like soul sand valley. Ghast should only spawn many in soul sand valley only. To find this bug :
1/Go in any nether biome (Not soul sand valley)
2/See where is the ghast spawning and kill it.
3/Move around
4/Ghast will spawn way too frequently if we even kill it.