Referencing MC classes (or classes that init mc classes) in a preload event like a mixin config plugin's onLoad, will prematurely load the MC classes and break mixins for all of the classes that are accidentally loaded there.
Remove all references to any class that loads MC classes
https://github.com/kikugie/elytra-trims/blob/f031b2df54baeb8f4db17ce9cd5202fdf4deca67/src/main/java/dev/kikugie/elytratrims/common/plugin/ETMixinPlugin.java#L23
Referencing MC classes (or classes that init mc classes) in a preload event like a mixin config plugin's onLoad, will prematurely load the MC classes and break mixins for all of the classes that are accidentally loaded there.
Remove all references to any class that loads MC classes