Basically my previous project/mod was using snapshots mappings, the current project I have uses mojangs mappings, for some reason it isn't working, Here are some examples below:

 

My current code (mojang mappings, which doesn't work):

    public static final RegistryObject<Item> DECLESE_SWORD = ITEMS.register("declese_sword",
            () -> new SwordItem(ModItemTier.DECLESE, 2, -2.4f,
                    new Item.Properties().tab(ModItemGroup.FRV_GROUP))
            {
                @Override
                public boolean hurtEnemy(ItemStack stack, LivingEntity target, LivingEntity attacker)
                {
                    if(!attacker.level.isClientSide())
                    {
                        target.addEffect(new EffectInstance(Effects.POISON, 100, 1));
                    }
                    return super.hurtEnemy(stack, target, attacker);
                }
            });

And the old working code (Snapshot mappings):

    public static final RegistryObject<Item> CORRUPT_SWORD = ITEMS.register("corrupt_sword",
            () -> new SwordItem(ModItemTier.CORRUPT, 90, -2f,
                    new Item.Properties().isImmuneToFire().group(ModItemGroup.FRV_GROUP))
            {
                @Override
                public boolean hitEntity(ItemStack stack, LivingEntity target, LivingEntity attacker) {
                    if(!attacker.world.isRemote()) {
                        target.addPotionEffect(new EffectInstance(Effects.WITHER, 1000, 2));
                        target.addPotionEffect(new EffectInstance(Effects.SLOWNESS, 1000, 2));
                        target.addPotionEffect(new EffectInstance(Effects.POISON, 1000, 2));
                    }
                    return super.hitEntity(stack, target, attacker);
                }
            });

What could be the cause of it?

12 minutes ago, Feroov said:

My current code (mojang mappings, which doesn't work):

whats the error, since the code looks okay

6 minutes ago, Luis_ST said:

whats the error, since the code looks okay

There are no errors, the game runs fine, when I hit any entity it just doesn't apply the effect

is the hurtEnemy method called and how did you test if the target gets/doesn't get the effect?

9 hours ago, Luis_ST said:

is the hurtEnemy method called and how did you test if the target gets/doesn't get the effect?

Yes it is being called, I use IntelliJ, its called from the ItemStack class, and I tested directly just running the game hitting few entities basically

Ok I actually found out it actually works with other effects, but poison doesn't seem to be working, interesting