Paper/paper-server/nms-patches/net/minecraft/world/item/ItemEnderPearl.patch

--- a/net/minecraft/world/item/ItemEnderPearl.java
+++ b/net/minecraft/world/item/ItemEnderPearl.java
@@ -21,10 +21,17 @@
     public EnumInteractionResult use(World world, EntityHuman entityhuman, EnumHand enumhand) {
         ItemStack itemstack = entityhuman.getItemInHand(enumhand);
 
-        world.playSound((EntityHuman) null, entityhuman.getX(), entityhuman.getY(), entityhuman.getZ(), SoundEffects.ENDER_PEARL_THROW, SoundCategory.NEUTRAL, 0.5F, 0.4F / (world.getRandom().nextFloat() * 0.4F + 0.8F));
         if (world instanceof WorldServer worldserver) {
-            IProjectile.spawnProjectileFromRotation(EntityEnderPearl::new, worldserver, itemstack, entityhuman, 0.0F, 1.5F, 1.0F);
+            // CraftBukkit start
+            if (IProjectile.spawnProjectileFromRotation(EntityEnderPearl::new, worldserver, itemstack, entityhuman, 0.0F, 1.5F, 1.0F).isRemoved()) {
+                if (entityhuman instanceof net.minecraft.server.level.EntityPlayer) {
+                    ((net.minecraft.server.level.EntityPlayer) entityhuman).getBukkitEntity().updateInventory();
+                }
+                return EnumInteractionResult.FAIL;
+            }
         }
+        world.playSound((EntityHuman) null, entityhuman.getX(), entityhuman.getY(), entityhuman.getZ(), SoundEffects.ENDER_PEARL_THROW, SoundCategory.NEUTRAL, 0.5F, 0.4F / (world.getRandom().nextFloat() * 0.4F + 0.8F));
+        // CraftBukkit end
 
         entityhuman.awardStat(StatisticList.ITEM_USED.get(this));
         itemstack.consume(1, entityhuman);