Fix second setInstance method

src/main/java/net/minestom/server/entity/Entity.java

@@ -845,7 +845,8 @@ public class Entity implements Viewable, Tickable, EventHandler<EntityEvent>, Da
      *
      * @param instance      the new instance of the entity
      * @param spawnPosition the spawn position for the entity.
-     * @return
+     * @return a {@link CompletableFuture} called once the entity's instance has been set,
+     * this is due to chunks needing to load for players
      * @throws IllegalStateException if {@code instance} has not been registered in {@link InstanceManager}
      */
     public CompletableFuture<Void> setInstance(@NotNull Instance instance, @NotNull Pos spawnPosition) {
@@ -872,11 +873,13 @@ public class Entity implements Viewable, Tickable, EventHandler<EntityEvent>, Da
      * Changes the entity instance.
      *
      * @param instance the new instance of the entity
+     * @return a {@link CompletableFuture} called once the entity's instance has been set,
+     * this is due to chunks needing to load for players
      * @throws NullPointerException  if {@code instance} is null
      * @throws IllegalStateException if {@code instance} has not been registered in {@link InstanceManager}
      */
-    public void setInstance(@NotNull Instance instance) {
+    public CompletableFuture<Void> setInstance(@NotNull Instance instance) {
-        setInstance(instance, this.position);
+        return setInstance(instance, this.position);
     }
 
     /**

src/main/java/net/minestom/server/entity/Player.java

@@ -560,11 +560,13 @@ public class Player extends LivingEntity implements CommandSender, Localizable,
      * if the player is not in any instance).
      *
      * @param instance the new player instance
+     * @return a {@link CompletableFuture} called once the entity's instance has been set,
+     * this is due to chunks needing to load for players
      * @see #setInstance(Instance, Pos)
      */
     @Override
-    public void setInstance(@NotNull Instance instance) {
+    public CompletableFuture<Void> setInstance(@NotNull Instance instance) {
-        setInstance(instance, this.instance != null ? getPosition() : getRespawnPoint());
+        return setInstance(instance, this.instance != null ? getPosition() : getRespawnPoint());
     }
 
     /**

src/main/java/net/minestom/server/entity/fakeplayer/FakePlayer.java

@@ -3,6 +3,7 @@ package net.minestom.server.entity.fakeplayer;
 import com.extollit.gaming.ai.path.HydrazinePathFinder;
 import net.minestom.server.MinecraftServer;
 import net.minestom.server.attribute.Attribute;
+import net.minestom.server.coordinate.Pos;
 import net.minestom.server.entity.Player;
 import net.minestom.server.entity.pathfinding.NavigableEntity;
 import net.minestom.server.entity.pathfinding.Navigator;
@@ -16,6 +17,7 @@ import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
 import java.util.UUID;
+import java.util.concurrent.CompletableFuture;
 import java.util.function.Consumer;
 
 /**
@@ -118,10 +120,10 @@ public class FakePlayer extends Player implements NavigableEntity {
     }
 
     @Override
-    public void setInstance(@NotNull Instance instance) {
+    public CompletableFuture<Void> setInstance(@NotNull Instance instance, @NotNull Pos spawnPosition) {
         this.navigator.setPathFinder(new HydrazinePathFinder(navigator.getPathingEntity(), instance.getInstanceSpace()));
 
-        super.setInstance(instance);
+        return super.setInstance(instance, spawnPosition);
     }
 
     @Override