PaperMC/paper-server/nms-patches/net/minecraft/world/entity/projectile/EntityThrownExpBottle.patch

--- a/net/minecraft/world/entity/projectile/EntityThrownExpBottle.java
+++ b/net/minecraft/world/entity/projectile/EntityThrownExpBottle.java
@@ -11,6 +11,10 @@
 import net.minecraft.world.level.World;
 import net.minecraft.world.phys.MovingObjectPosition;
 
+// CraftBukkit start
+import org.bukkit.event.entity.EntityRemoveEvent;
+// CraftBukkit end
+
 public class EntityThrownExpBottle extends EntityProjectileThrowable {
 
     public EntityThrownExpBottle(EntityTypes<? extends EntityThrownExpBottle> entitytypes, World world) {
@@ -39,11 +43,20 @@
     protected void onHit(MovingObjectPosition movingobjectposition) {
         super.onHit(movingobjectposition);
         if (this.level() instanceof WorldServer) {
-            this.level().levelEvent(2002, this.blockPosition(), PotionContents.getColor(Potions.WATER));
+            // CraftBukkit - moved to after event
+            // this.level().levelEvent(2002, this.blockPosition(), PotionContents.getColor(Potions.WATER));
             int i = 3 + this.level().random.nextInt(5) + this.level().random.nextInt(5);
 
+            // CraftBukkit start
+            org.bukkit.event.entity.ExpBottleEvent event = org.bukkit.craftbukkit.event.CraftEventFactory.callExpBottleEvent(this, movingobjectposition, i);
+            i = event.getExperience();
+            if (event.getShowEffect()) {
+                this.level().levelEvent(2002, this.blockPosition(), PotionContents.getColor(Potions.WATER));
+            }
+            // CraftBukkit end
+
             EntityExperienceOrb.award((WorldServer) this.level(), this.position(), i);
-            this.discard();
+            this.discard(EntityRemoveEvent.Cause.HIT); // CraftBukkit - add Bukkit remove cause
         }
 
     }