diff --git a/Barotrauma/BarotraumaClient/Source/GUI/GUI.cs b/Barotrauma/BarotraumaClient/Source/GUI/GUI.cs
index ec5b88851..cbb751f50 100644
--- a/Barotrauma/BarotraumaClient/Source/GUI/GUI.cs
+++ b/Barotrauma/BarotraumaClient/Source/GUI/GUI.cs
@@ -656,6 +656,13 @@ namespace Barotrauma
                 msg.Timer -= deltaTime;                
                 msg.Pos += msg.Velocity * deltaTime;                
             }
+            
+            foreach (GUIMessage msg in messages)
+            {
+                if (!msg.WorldSpace) continue;
+                msg.Timer -= deltaTime;                
+                msg.Pos += msg.Velocity * deltaTime;                
+            }
         }
 
             messages.RemoveAll(m => m.Timer <= 0.0f);
diff --git a/Barotrauma/BarotraumaShared/Source/Characters/AI/EnemyAIController.cs b/Barotrauma/BarotraumaShared/Source/Characters/AI/EnemyAIController.cs
index 8028b410e..19e804838 100644
--- a/Barotrauma/BarotraumaShared/Source/Characters/AI/EnemyAIController.cs
+++ b/Barotrauma/BarotraumaShared/Source/Characters/AI/EnemyAIController.cs
@@ -1089,50 +1089,7 @@ namespace Barotrauma
                 string targetingTag = null;
                 if (targetCharacter != null)
                 {
-                    if (targetCharacter.Submarine != null && Character.Submarine == null)
-                    {
-                        targetingTag = "dead";
-                        if (targetCharacter.Submarine != Character.Submarine)
-                        {
-                            // In a different sub or the target is outside when we are inside or vice versa -> Ignore the target
-                            continue;
-                        }
-                        else if (targetCharacter.CurrentHull != Character.CurrentHull)
-                        {
-                            // In the same sub, halve the priority, if not in the same hull.
-                            valueModifier = 0.5f;
-                        }
-                    }
-                    else if (targetCharacter.AIController is EnemyAIController enemy)
-                    {
-                        if (enemy.combatStrength > combatStrength)
-                        {
-                            targetingTag = "stronger";
-                        }
-                        else if (enemy.combatStrength < combatStrength)
-                        {
-                            targetingTag = "weaker";
-                        }
-                        if (State == AIState.Escape && targetingTag == "stronger")
-                        {
-                            // Frightened
-                            valueModifier = 2;
-                        }
-                        else
-                        {
-                            if (targetCharacter.Submarine != Character.Submarine)
-                            {
-                                // In a different sub or the target is outside when we are inside or vice versa -> Ignore the target
-                                continue;
-                            }
-                            else if (targetCharacter.CurrentHull != Character.CurrentHull)
-                            {
-                                // In the same sub, halve the priority, if not in the same hull.
-                                valueModifier = 0.5f;
-                            }
-                        }
-                    }
-                    else if (targetCharacter.Submarine != null && Character.Submarine == null)
+                    if (targetCharacter.IsDead)
                     {
                         targetingTag = "dead";
                         if (targetCharacter.Submarine != Character.Submarine)
@@ -1276,11 +1233,49 @@ namespace Barotrauma
                                 valueModifier = isOutdoor ? 1 : 0;
                                 valueModifier *= isOpen ? 5 : 1;
                             }
-                            for (int i = 0; i < s.Sections.Length; i++)
+                        }
+                    }
+                    else if (targetCharacter.Submarine != null && Character.Submarine == null)
+                    {
+                        targetingTag = "dead";
+                        if (targetCharacter.Submarine != Character.Submarine)
+                        {
+                            // In a different sub or the target is outside when we are inside or vice versa -> Ignore the target
+                            continue;
+                        }
+                        else if (targetCharacter.CurrentHull != Character.CurrentHull)
+                        {
+                            // In the same sub, halve the priority, if not in the same hull.
+                            valueModifier = 0.5f;
+                        }
+                    }
+                    else if (targetCharacter.AIController is EnemyAIController enemy)
+                    {
+                        if (enemy.combatStrength > combatStrength)
+                        {
+                            targetingTag = "stronger";
+                        }
+                        else if (enemy.combatStrength < combatStrength)
+                        {
+                            targetingTag = "weaker";
+                        }
+                        if (State == AIState.Escape && targetingTag == "stronger")
+                        {
+                            // Frightened
+                            valueModifier = 2;
+                        }
+                        else
+                        {
+                            if (targetCharacter.Submarine != Character.Submarine)
                             {
                                 valueModifier = isOutdoor ? 0 : 1;
                                 valueModifier *= isOpen ? 0 : 1;
                             }
+                            else if (targetCharacter.CurrentHull != Character.CurrentHull)
+                            {
+                                // In the same sub, halve the priority, if not in the same hull.
+                                valueModifier = 0.5f;
+                            }
                         }
                         else if (isOpen) //ignore broken and open doors
                         {
@@ -1308,6 +1303,11 @@ namespace Barotrauma
 
                 valueModifier *= targetingPriorities[targetingTag].Priority;
 
+                if (targetingTag == null) continue;
+                if (!targetingPriorities.ContainsKey(targetingTag)) continue;
+
+                valueModifier *= targetingPriorities[targetingTag].Priority;
+
                 if (valueModifier == 0.0f) continue;
 
                 Vector2 toTarget = target.WorldPosition - character.WorldPosition;
diff --git a/Barotrauma/BarotraumaShared/Source/Items/ItemPrefab.cs b/Barotrauma/BarotraumaShared/Source/Items/ItemPrefab.cs
index f8517fe73..df13f9a00 100644
--- a/Barotrauma/BarotraumaShared/Source/Items/ItemPrefab.cs
+++ b/Barotrauma/BarotraumaShared/Source/Items/ItemPrefab.cs
@@ -851,6 +851,39 @@ namespace Barotrauma
 
             AllowedLinks = element.GetAttributeStringArray("allowedlinks", new string[0], convertToLowerInvariant: true).ToList();
 
+            if (sprite == null)
+            {
+                DebugConsole.ThrowError("Item \"" + Name + "\" has no sprite!");
+#if SERVER
+                sprite = new Sprite("", Vector2.Zero);
+                sprite.SourceRect = new Rectangle(0, 0, 32, 32);
+#else
+                sprite = new Sprite(TextureLoader.PlaceHolderTexture, null, null)
+                {
+                    Origin = TextureLoader.PlaceHolderTexture.Bounds.Size.ToVector2() / 2
+                };
+#endif
+                size = sprite.size;
+                sprite.EntityID = identifier;
+            }
+            
+            if (!category.HasFlag(MapEntityCategory.Legacy) && string.IsNullOrEmpty(identifier))
+            {
+                DebugConsole.ThrowError(
+                    "Item prefab \"" + name + "\" has no identifier. All item prefabs have a unique identifier string that's used to differentiate between items during saving and loading.");
+            }
+            if (!string.IsNullOrEmpty(identifier))
+            {
+                MapEntityPrefab existingPrefab = List.Find(e => e.Identifier == identifier);
+                if (existingPrefab != null)
+                {
+                    DebugConsole.ThrowError(
+                        "Map entity prefabs \"" + name + "\" and \"" + existingPrefab.Name + "\" have the same identifier!");
+                }
+            }
+
+            AllowedLinks = element.GetAttributeStringArray("allowedlinks", new string[0], convertToLowerInvariant: true).ToList();
+
             List.Add(this);
         }