diff --git a/Spigot-Server-Patches/0339-Slime-Pathfinder-Events.patch b/Spigot-Server-Patches/0339-Slime-Pathfinder-Events.patch
index ac311516ff..739be12a7f 100644
--- a/Spigot-Server-Patches/0339-Slime-Pathfinder-Events.patch
+++ b/Spigot-Server-Patches/0339-Slime-Pathfinder-Events.patch
@@ -1,11 +1,11 @@
-From b128c99c11c451eb05ae62b6585e565e90939db5 Mon Sep 17 00:00:00 2001
+From 94377d65907b8bb20d19f0a357e1d37b851b68f6 Mon Sep 17 00:00:00 2001
 From: BillyGalbreath <Blake.Galbreath@GMail.com>
 Date: Fri, 24 Aug 2018 08:18:42 -0500
 Subject: [PATCH] Slime Pathfinder Events
 
 
 diff --git a/src/main/java/net/minecraft/server/EntitySlime.java b/src/main/java/net/minecraft/server/EntitySlime.java
-index 238f3c7926..cfa4710b78 100644
+index 238f3c792..586b9a3a6 100644
 --- a/src/main/java/net/minecraft/server/EntitySlime.java
 +++ b/src/main/java/net/minecraft/server/EntitySlime.java
 @@ -57,6 +57,7 @@ public class EntitySlime extends EntityInsentient implements IMonster {
@@ -16,15 +16,19 @@ index 238f3c7926..cfa4710b78 100644
      }
  
      public void a(NBTTagCompound nbttagcompound) {
-@@ -69,6 +70,7 @@ public class EntitySlime extends EntityInsentient implements IMonster {
+@@ -69,6 +70,11 @@ public class EntitySlime extends EntityInsentient implements IMonster {
  
          this.setSize(i + 1, false);
          this.bD = nbttagcompound.getBoolean("wasOnGround");
-+        this.canWander = nbttagcompound.getBoolean("Paper.canWander"); // Paper
++        // Paper start - check exists before loading or this will be loaded as false
++        if (nbttagcompound.hasKey("Paper.canWander")) {
++            this.canWander = nbttagcompound.getBoolean("Paper.canWander");
++        }
++        // Paper end
      }
  
      public boolean dy() {
-@@ -308,7 +310,7 @@ public class EntitySlime extends EntityInsentient implements IMonster {
+@@ -308,7 +314,7 @@ public class EntitySlime extends EntityInsentient implements IMonster {
          }
  
          public boolean a() {
@@ -33,7 +37,7 @@ index 238f3c7926..cfa4710b78 100644
          }
  
          public void e() {
-@@ -327,7 +329,7 @@ public class EntitySlime extends EntityInsentient implements IMonster {
+@@ -327,7 +333,7 @@ public class EntitySlime extends EntityInsentient implements IMonster {
          }
  
          public boolean a() {
@@ -42,7 +46,7 @@ index 238f3c7926..cfa4710b78 100644
          }
  
          public void e() {
-@@ -351,13 +353,17 @@ public class EntitySlime extends EntityInsentient implements IMonster {
+@@ -351,13 +357,17 @@ public class EntitySlime extends EntityInsentient implements IMonster {
          }
  
          public boolean a() {
@@ -62,7 +66,7 @@ index 238f3c7926..cfa4710b78 100644
              }
  
              ((EntitySlime.ControllerMoveSlime) this.a.getControllerMove()).a(this.b, false);
-@@ -377,7 +383,16 @@ public class EntitySlime extends EntityInsentient implements IMonster {
+@@ -377,7 +387,16 @@ public class EntitySlime extends EntityInsentient implements IMonster {
          public boolean a() {
              EntityLiving entityliving = this.a.getGoalTarget();
  
@@ -80,7 +84,7 @@ index 238f3c7926..cfa4710b78 100644
          }
  
          public void c() {
-@@ -388,7 +403,16 @@ public class EntitySlime extends EntityInsentient implements IMonster {
+@@ -388,7 +407,16 @@ public class EntitySlime extends EntityInsentient implements IMonster {
          public boolean b() {
              EntityLiving entityliving = this.a.getGoalTarget();
  
@@ -98,7 +102,7 @@ index 238f3c7926..cfa4710b78 100644
          }
  
          public void e() {
-@@ -452,4 +476,15 @@ public class EntitySlime extends EntityInsentient implements IMonster {
+@@ -452,4 +480,15 @@ public class EntitySlime extends EntityInsentient implements IMonster {
              }
          }
      }
@@ -115,7 +119,7 @@ index 238f3c7926..cfa4710b78 100644
 +    // Paper end
  }
 diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftSlime.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftSlime.java
-index 18e7ef80ac..8403c1e01c 100644
+index 18e7ef80a..8403c1e01 100644
 --- a/src/main/java/org/bukkit/craftbukkit/entity/CraftSlime.java
 +++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftSlime.java
 @@ -33,4 +33,14 @@ public class CraftSlime extends CraftMob implements Slime {