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

@@ -1,6 +1,6 @@
 --- a/net/minecraft/world/item/EnderpearlItem.java
 +++ b/net/minecraft/world/item/EnderpearlItem.java
-@@ -21,22 +_,38 @@
+@@ -21,22 +_,42 @@
      @Override
      public InteractionResult use(Level level, Player player, InteractionHand hand) {
          ItemStack itemInHand = player.getItemInHand(hand);
@@ -39,7 +39,11 @@
 +                );
 +                player.awardStat(Stats.ITEM_USED.get(this));
 +            } else {
-+            // Paper end - PlayerLaunchProjectileEvent
++                if (player instanceof net.minecraft.server.level.ServerPlayer serverPlayer) {
++                    serverPlayer.deregisterEnderPearl(thrownEnderpearl.projectile());
++                    serverPlayer.connection.send(new net.minecraft.network.protocol.game.ClientboundCooldownPacket(player.getCooldowns().getCooldownGroup(itemInHand), 0)); // prevent visual desync of cooldown on the slot
++                }
++                // Paper end - PlayerLaunchProjectileEvent
 +                player.containerMenu.sendAllDataToRemote();
 +                return InteractionResult.FAIL;
 +            }