Paper/nms-patches/PathfinderGoalTarget.patch

--- a/net/minecraft/server/PathfinderGoalTarget.java
+++ b/net/minecraft/server/PathfinderGoalTarget.java
@@ -1,6 +1,7 @@
 package net.minecraft.server;
 
 import javax.annotation.Nullable;
+import org.bukkit.event.entity.EntityTargetEvent; // CraftBukkit
 
 public abstract class PathfinderGoalTarget extends PathfinderGoal {
 
@@ -59,7 +60,7 @@
                     if (entityliving instanceof EntityHuman && ((EntityHuman) entityliving).abilities.isInvulnerable) {
                         return false;
                     } else {
-                        this.e.setGoalTarget(entityliving);
+                        this.e.setGoalTarget(entityliving, EntityTargetEvent.TargetReason.CLOSEST_ENTITY, true); // CraftBukkit
                         return true;
                     }
                 }
@@ -80,7 +81,7 @@
 
     @Override
     public void d() {
-        this.e.setGoalTarget((EntityLiving) null);
+        this.e.setGoalTarget((EntityLiving) null, EntityTargetEvent.TargetReason.FORGOT_TARGET, true); // CraftBukkit
         this.g = null;
     }