PaperMC/paper-server/patches/sources/net/minecraft/world/item/ItemUtils.java.patch

--- a/net/minecraft/world/item/ItemUtils.java
+++ b/net/minecraft/world/item/ItemUtils.java
@@ -41,7 +_,15 @@
     public static void onContainerDestroyed(ItemEntity container, Iterable<ItemStack> contents) {
         Level level = container.level();
         if (!level.isClientSide) {
-            contents.forEach(itemStack -> level.addFreshEntity(new ItemEntity(level, container.getX(), container.getY(), container.getZ(), itemStack)));
+            // Paper start - call EntityDropItemEvent
+            contents.forEach(itemStack -> {
+                ItemEntity droppedItem = new ItemEntity(level, container.getX(), container.getY(), container.getZ(), itemStack);
+                org.bukkit.event.entity.EntityDropItemEvent event = new org.bukkit.event.entity.EntityDropItemEvent(container.getBukkitEntity(), (org.bukkit.entity.Item) droppedItem.getBukkitEntity());
+                if (event.callEvent()) {
+                    level.addFreshEntity(droppedItem);
+                }
+            });
+            // Paper end - call EntityDropItemEvent
         }
     }
 }