Registries must be provided through RegistryOps when serializing item components, or else some things might not save. In vanilla the primairly applies to enchantments, but for mods more important components can also be affected. Specifically, its impossible to customize the mecha from plastar, as all of our components rely on dynamic registries to function. Most places where scattered shards deals with nbt should have access to registries (client code can always get it through MinecraftClient.world).
Pls fix.