i disabled aether redux in my modpack for my current world due to incompatibilities with ancient aether, and when i entered the aether, overworld mobs are spawning in the dark areas for some reason

the world was made with redux disabled, and then I enabled it later, then disabled it again after adding ancient aether. this is the only time this has happened
latest.log

This probably due redux biomes being removed which caused the game to default back to a plains biome where the redux biomes were