I'm pretty sure this is some sort of registration order issue, since NBT Studio is showing the internal ID number for my effects changing.
I don't think I'm doing anything unusual with my registration, here is the class: https://github.com/beholderface/oneironaut/blob/1.20.1/common/src/main/java/net/beholderface/oneironaut/registry/OneironautMiscRegistry.java
I saw someone here mention that referring to modded things in mixin classes could mess with registration order, but I just tried moving all the logic that did that into separate classes, and it's still happening.
#Modded status effects turning into other modded effects when restarting game
sweet canyon
sweet canyon
I tried turning off all the mixins and it's still happening, so it's presumably not something with that
sweet canyon
switching from architectury's DeferredRegister to directly calling Registry.register also did not help
toxic stratus
Registration order shouldn't matter, I know that much.
Unless some library (or you) changes that.
If it helps any, Fabric mods are intended to work independent of load order. Also, while developing, mod load order is randomized each launch in order to avoid depending on it (with or without realizing). During production, it's arbitrary but consistent.
sweet canyon
finally got around to testing it outside of dev and it doesn't seem to happen