craftbukkit/nms-patches/net/minecraft/world/entity/monster/EntityVex.patch

--- a/net/minecraft/world/entity/monster/EntityVex.java
+++ b/net/minecraft/world/entity/monster/EntityVex.java
@@ -49,8 +49,8 @@
     EntityInsentient owner;
     @Nullable
     private BlockPosition boundOrigin;
-    private boolean hasLimitedLife;
-    private int limitedLifeTicks;
+    public boolean hasLimitedLife; // CraftBukkit - PAIL, private -> public
+    public int limitedLifeTicks; // CraftBukkit - PAIL, private -> public
 
     public EntityVex(EntityTypes<? extends EntityVex> entitytypes, World world) {
         super(entitytypes, world);
@@ -368,7 +368,7 @@
 
         @Override
         public void start() {
-            EntityVex.this.setTarget(EntityVex.this.owner.getTarget());
+            EntityVex.this.setTarget(EntityVex.this.owner.getTarget(), org.bukkit.event.entity.EntityTargetEvent.TargetReason.OWNER_ATTACKED_TARGET, true); // CraftBukkit
             super.start();
         }
     }