Using 1.18.2 Minecraft
Single player environment.

Here's Config:
majruszsdifficulty-server.txt

MOB by Mod:

Ghost - Ice and Fire mod.
problem: ghosts still spawn from graveyard soil at night and trapped ghost chests.

Spawnerhead - Spawnerhead mod.
problem: still randomly spawns at night.

Normal Mode should prevent these entities from spawning until player goes to the Nether.
According to my configuration set in the .txt document.

Thanks for the report, I fixed that here 6b6525a and soon will release a new mod version with that fix included

Hi again, 1.8.0 has been released and it should not be an issue anymore