--- a/net/minecraft/world/item/enchantment/EnchantmentWeaponDamage.java
+++ b/net/minecraft/world/item/enchantment/EnchantmentWeaponDamage.java
@@ -35,7 +35,7 @@
             if (this.targets.get() == TagsEntity.SENSITIVE_TO_BANE_OF_ARTHROPODS && i > 0 && entityliving1.getType().is((TagKey) this.targets.get())) {
                 int j = 20 + entityliving.getRandom().nextInt(10 * i);
 
-                entityliving1.addEffect(new MobEffect(MobEffects.MOVEMENT_SLOWDOWN, j, 3));
+                entityliving1.addEffect(new MobEffect(MobEffects.MOVEMENT_SLOWDOWN, j, 3), org.bukkit.event.entity.EntityPotionEffectEvent.Cause.ATTACK); // CraftBukkit
             }
         }