Stop recreating threads without shutting down engine targets

src/main/java/com/volmit/iris/engine/IrisEngine.java

@@ -212,6 +212,11 @@ public class IrisEngine extends BlockPopulator implements Engine {
         return getData().getBiomeLoader().load(getDimension().getFocus());
     }
 
+    @Override
+    public void hotloading() {
+        close();
+    }
+
     @Override
     public void populate(@NotNull World world, @NotNull Random random, @NotNull Chunk c) {
         getWorldManager().spawnInitialEntities(c);

src/main/java/com/volmit/iris/engine/framework/Engine.java

@@ -378,4 +378,6 @@ public interface Engine extends DataProvider, Fallible, GeneratorAccess, LootPro
     }
 
     IrisBiome getFocus();
+
+    void hotloading();
 }

src/main/java/com/volmit/iris/engine/framework/EngineCompositeGenerator.java

@@ -127,6 +127,8 @@ public class EngineCompositeGenerator extends ChunkGenerator implements IrisAcce
 
                 }
             });
+
+            getComposite().close();
             initialized.lazySet(false);
         }
     }