Hey, back again, after some more modpack testing I started hearing noises and footsteps from passive mobs that should've been disabled by my config. Though they're invisible and have no hitboxes, I found "phantom" sheep eating grass and eggs popping out of nowhere from phantom chickens. I thought it might've been some weird mod incompatibility but a friend suggested I test it by itself, and the problem still persisted. I'm able to quickly test and prove that the mobs are still spawning by creating a superflat world with the overworld preset, and finding an animal pen in a village. Once I found one that had cow noises coming from it, I filled the enclosure with lava, and the invisible cow burned to death and dropped a cooked steak. After adding the Observable mod, I can also capture these "phantom" entities existence in a TPS profile, linked below. I also found an Enderman in a separate test, so I think the mod is only working on mobs that are hostile by default.

Minecraft version: 1.20.1
Mod loader: Quilt 0.26.4-beta.7
Mod version: 2.0.1

https://observable.tas.sh/p/slSC/aggregated

config: https://mclo.gs/YoL0pO6