craftbukkit/nms-patches/net/minecraft/world/entity/IEntityAngerable.patch

--- a/net/minecraft/world/entity/IEntityAngerable.java
+++ b/net/minecraft/world/entity/IEntityAngerable.java
@@ -108,7 +108,7 @@
     default void stopBeingAngry() {
         this.setLastHurtByMob((EntityLiving) null);
         this.setPersistentAngerTarget((UUID) null);
-        this.setTarget((EntityLiving) null);
+        this.setTarget((EntityLiving) null, org.bukkit.event.entity.EntityTargetEvent.TargetReason.FORGOT_TARGET, true); // CraftBukkit
         this.setRemainingPersistentAngerTime(0);
     }
 
@@ -121,6 +121,8 @@
 
     void setTarget(@Nullable EntityLiving entityliving);
 
+    boolean setTarget(@Nullable EntityLiving entityliving, org.bukkit.event.entity.EntityTargetEvent.TargetReason reason, boolean fireEvent); // CraftBukkit
+
     boolean canAttack(EntityLiving entityliving);
 
     @Nullable