diff --git a/pom.xml b/pom.xml
index 5d1c60d..13a3563 100644
--- a/pom.xml
+++ b/pom.xml
@@ -2,7 +2,7 @@
     <groupId>com.songoda</groupId>
     <artifactId>UltimateStacker</artifactId>
     <modelVersion>4.0.0</modelVersion>
-    <version>2.0.2</version>
+    <version>2.0.3</version>
     <build>
         <defaultGoal>clean install</defaultGoal>
         <finalName>UltimateStacker-${project.version}</finalName>
diff --git a/src/main/java/com/songoda/ultimatestacker/database/DataManager.java b/src/main/java/com/songoda/ultimatestacker/database/DataManager.java
index c243c64..ce6d292 100644
--- a/src/main/java/com/songoda/ultimatestacker/database/DataManager.java
+++ b/src/main/java/com/songoda/ultimatestacker/database/DataManager.java
@@ -119,9 +119,9 @@ public class DataManager extends DataManagerAbstract {
 
     public void createStackedEntity(EntityStack hostStack, StackedEntity stackedEntity) {
         this.queueAsync(() -> this.databaseConnector.connect(connection -> {
-            if (hostStack.getHostUniqueId() == null) return;
             String createSerializedEntity = "INSERT INTO " + this.getTablePrefix() + "stacked_entities (uuid, host, serialized_entity) VALUES (?, ?, ?)";
             try (PreparedStatement statement = connection.prepareStatement(createSerializedEntity)) {
+                if (hostStack.getHostUniqueId() == null) return;
                 statement.setString(1, stackedEntity.getUniqueId().toString());
                 statement.setInt(2, hostStack.getId());
                 statement.setBytes(3, stackedEntity.getSerializedEntity());
@@ -132,10 +132,10 @@ public class DataManager extends DataManagerAbstract {
 
     public void createStackedEntities(ColdEntityStack hostStack, List<StackedEntity> stackedEntities) {
         this.queueAsync(() -> this.databaseConnector.connect(connection -> {
-            if (hostStack.getHostUniqueId() == null) return;
             String createSerializedEntity = "INSERT INTO " + this.getTablePrefix() + "stacked_entities (uuid, host, serialized_entity) VALUES (?, ?, ?)" +
                     "ON CONFLICT(uuid) DO UPDATE SET host = ?, serialized_entity = ?";
             try (PreparedStatement statement = connection.prepareStatement(createSerializedEntity)) {
+                if (hostStack.getHostUniqueId() == null) return;
                 for (StackedEntity entity : stackedEntities) {
                     statement.setString(1, entity.getUniqueId().toString());
                     statement.setInt(2, hostStack.getId());
@@ -151,9 +151,9 @@ public class DataManager extends DataManagerAbstract {
 
     public void updateHost(ColdEntityStack hostStack) {
         this.async(() -> this.databaseConnector.connect(connection -> {
-            if (hostStack.getHostUniqueId() == null) return;
             String updateHost = "UPDATE " + this.getTablePrefix() + "host_entities SET uuid = ?, create_duplicates = ? WHERE id = ?";
             try (PreparedStatement statement = connection.prepareStatement(updateHost)) {
+                if (hostStack.getHostUniqueId() == null) return;
                 statement.setString(1, hostStack.getHostUniqueId().toString());
                 statement.setInt(2, hostStack.getCreateDuplicates());
                 statement.setInt(3, hostStack.getId());
diff --git a/src/main/java/com/songoda/ultimatestacker/lootables/LootablesManager.java b/src/main/java/com/songoda/ultimatestacker/lootables/LootablesManager.java
index e5aeac7..0973821 100644
--- a/src/main/java/com/songoda/ultimatestacker/lootables/LootablesManager.java
+++ b/src/main/java/com/songoda/ultimatestacker/lootables/LootablesManager.java
@@ -66,10 +66,12 @@ public class LootablesManager {
         Entity killerEntity = null;
         if (entity.getLastDamageCause() instanceof EntityDamageByEntityEvent) {
             killerEntity = ((EntityDamageByEntityEvent) entity.getLastDamageCause()).getDamager();
+            killer = killerEntity.getType();
             if (killerEntity instanceof Projectile) {
                 Projectile projectile = (Projectile) killerEntity;
                 if (projectile.getShooter() instanceof Entity) {
-                    killer = ((Entity) projectile.getShooter()).getType();
+                    killerEntity = ((Entity) projectile.getShooter());
+                    killer = killerEntity.getType();
                 }
             }
         }
diff --git a/src/main/java/com/songoda/ultimatestacker/stackable/entity/EntityStack.java b/src/main/java/com/songoda/ultimatestacker/stackable/entity/EntityStack.java
index 09ef640..f333ebf 100644
--- a/src/main/java/com/songoda/ultimatestacker/stackable/entity/EntityStack.java
+++ b/src/main/java/com/songoda/ultimatestacker/stackable/entity/EntityStack.java
@@ -17,7 +17,6 @@ import org.bukkit.util.Vector;
 
 import java.util.ArrayList;
 import java.util.List;
-import java.util.UUID;
 import java.util.concurrent.ThreadLocalRandom;
 
 public class EntityStack extends ColdEntityStack {
@@ -83,7 +82,6 @@ public class EntityStack extends ColdEntityStack {
         plugin.getEntityStackManager().removeStack(event.getEntity());
         plugin.getDataManager().deleteHost(this);
 
-
         Location killedLocation = killed.getLocation();
         List<Drop> preStackedDrops = new ArrayList<>();
         for (int i = 1; i < getAmount(); i++) {
@@ -98,14 +96,14 @@ public class EntityStack extends ColdEntityStack {
                 drops = plugin.getLootablesManager().getDrops(killed);
             preStackedDrops.addAll(drops);
         }
-        if (!preStackedDrops.isEmpty())
-            DropUtils.processStackedDrop(killed, preStackedDrops, event);
+
+        DropUtils.processStackedDrop(killed, preStackedDrops, event);
 
         if (droppedExp > 0)
             killedLocation.getWorld().spawn(killedLocation, ExperienceOrb.class).setExperience(droppedExp * getAmount());
 
         if (killed.getKiller() == null) return;
-        UltimateStacker.getInstance().addExp(killed.getKiller(), this);
+        plugin.addExp(killed.getKiller(), this);
     }
 
     private void handleSingleStackDeath(LivingEntity killed, List<Drop> drops, EntityDeathEvent event) {
diff --git a/src/main/java/com/songoda/ultimatestacker/stackable/spawner/SpawnerStack.java b/src/main/java/com/songoda/ultimatestacker/stackable/spawner/SpawnerStack.java
index 91477c6..da6c461 100644
--- a/src/main/java/com/songoda/ultimatestacker/stackable/spawner/SpawnerStack.java
+++ b/src/main/java/com/songoda/ultimatestacker/stackable/spawner/SpawnerStack.java
@@ -5,9 +5,9 @@ import com.songoda.core.compatibility.ServerVersion;
 import com.songoda.ultimatestacker.UltimateStacker;
 import com.songoda.ultimatestacker.settings.Settings;
 import com.songoda.ultimatestacker.stackable.Hologramable;
-import com.songoda.ultimatestacker.utils.Stackable;
 import com.songoda.ultimatestacker.utils.Methods;
 import com.songoda.ultimatestacker.utils.Reflection;
+import com.songoda.ultimatestacker.utils.Stackable;
 import org.bukkit.Bukkit;
 import org.bukkit.Location;
 import org.bukkit.World;
@@ -85,6 +85,10 @@ public class SpawnerStack implements Stackable, Hologramable {
 
     @Override
     public String getHologramName() {
+        if (!(location.getBlock().getState() instanceof CreatureSpawner)) {
+            plugin.getSpawnerStackManager().removeSpawner(location);
+            return null;
+        }
         CreatureSpawner creatureSpawner = (CreatureSpawner) location.getBlock().getState();
         return Methods.compileSpawnerName(creatureSpawner.getSpawnedType(), amount);
     }