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

--- a/net/minecraft/world/entity/projectile/EntityEnderSignal.java
+++ b/net/minecraft/world/entity/projectile/EntityEnderSignal.java
@@ -16,6 +16,10 @@
 import net.minecraft.world.level.World;
 import net.minecraft.world.phys.Vec3D;
 
+// CraftBukkit start
+import org.bukkit.event.entity.EntityRemoveEvent;
+// CraftBukkit end
+
 public class EntityEnderSignal extends Entity implements ItemSupplier {
 
     private static final DataWatcherObject<ItemStack> DATA_ITEM_STACK = DataWatcher.defineId(EntityEnderSignal.class, DataWatcherRegistry.ITEM_STACK);
@@ -146,7 +150,7 @@
             ++this.life;
             if (this.life > 80 && !this.level().isClientSide) {
                 this.playSound(SoundEffects.ENDER_EYE_DEATH, 1.0F, 1.0F);
-                this.discard();
+                this.discard(this.surviveAfterDeath ? EntityRemoveEvent.Cause.DROP : EntityRemoveEvent.Cause.DESPAWN); // CraftBukkit - add Bukkit remove cause
                 if (this.surviveAfterDeath) {
                     this.level().addFreshEntity(new EntityItem(this.level(), this.getX(), this.getY(), this.getZ(), this.getItem()));
                 } else {
@@ -167,7 +171,12 @@
     @Override
     public void readAdditionalSaveData(NBTTagCompound nbttagcompound) {
         if (nbttagcompound.contains("Item", 10)) {
-            this.setItem((ItemStack) ItemStack.parse(this.registryAccess(), nbttagcompound.getCompound("Item")).orElse(this.getDefaultItem()));
+            // CraftBukkit start - SPIGOT-6103 summon, see also SPIGOT-5474
+            ItemStack itemstack = (ItemStack) ItemStack.parse(this.registryAccess(), nbttagcompound.getCompound("Item")).orElse(this.getDefaultItem());
+            if (!itemstack.isEmpty()) {
+                this.setItem(itemstack);
+            }
+            // CraftBukkit end
         } else {
             this.setItem(this.getDefaultItem());
         }