This mod isn't compatible with my fabric mod, Harder Farther. I'm not sure how you do the spawning, but your mobs ignore my whitelist & spawn regardless of whether or not they're allowed in my config.

After a little bit of digging. I have found that your mobs don't have a spawn reason for some reason. At least for natural spawning, this is the case. Instead they have a null spawn reason. I can only assume this is because your mod doesn't run the finalizeSpawn method correctly.