After 2 IRL days of playtime, I've started having constant and instant sanity drain anywhere in my home. If I'm not doing something that raises my sanity or around something that raises my sanity it'll instantly start going down. There are seemingly no enemies, no unsettling music, no dying pets, etc around (F3+B hitboxes shows no invisible sanity drainers) . Is there something i'm missing?

Are you sure this is not the modpack's feature?