PaperMC/paper-server/nms-patches/net/minecraft/world/item/ItemCrossbow.patch

--- a/net/minecraft/world/item/ItemCrossbow.java
+++ b/net/minecraft/world/item/ItemCrossbow.java
@@ -236,11 +236,27 @@
 
                 ((IProjectile) object).shoot((double) vector3f.x(), (double) vector3f.y(), (double) vector3f.z(), f1, f2);
             }
+            // CraftBukkit start
+            org.bukkit.event.entity.EntityShootBowEvent event = org.bukkit.craftbukkit.event.CraftEventFactory.callEntityShootBowEvent(entityliving, itemstack, itemstack1, (Entity) object, entityliving.getUsedItemHand(), f, true);
+            if (event.isCancelled()) {
+                event.getProjectile().remove();
+                return;
+            }
+            // CraftBukkit end
 
             itemstack.hurtAndBreak(flag1 ? 3 : 1, entityliving, (entityliving1) -> {
                 entityliving1.broadcastBreakEvent(enumhand);
             });
-            world.addFreshEntity((Entity) object);
+            // CraftBukkit start
+            if (event.getProjectile() == ((Entity) object).getBukkitEntity()) {
+                if (!world.addFreshEntity((Entity) object)) {
+                    if (entityliving instanceof EntityPlayer) {
+                        ((EntityPlayer) entityliving).getBukkitEntity().updateInventory();
+                    }
+                    return;
+                }
+            }
+            // CraftBukkit end
             world.playSound((EntityHuman) null, entityliving.getX(), entityliving.getY(), entityliving.getZ(), SoundEffects.CROSSBOW_SHOOT, SoundCategory.PLAYERS, 1.0F, f);
         }
     }