This would probably end up being an issue...

core/src/main/java/org/geysermc/geyser/session/cache/registry/SimpleJavaRegistry.java

@@ -48,6 +48,7 @@ public class SimpleJavaRegistry<T> implements JavaRegistry<T> {
 
     @Override
     public void reset(List<T> values) {
+        this.values.clear();
         this.values.addAll(values);
         this.values.trim();
     }