--- a/net/minecraft/core/cauldron/CauldronInteraction.java
+++ b/net/minecraft/core/cauldron/CauldronInteraction.java
@@ -30,6 +30,10 @@
 import net.minecraft.world.level.block.state.properties.IBlockState;
 import net.minecraft.world.level.gameevent.GameEvent;
 
+// CraftBukkit start
+import org.bukkit.event.block.CauldronLevelChangeEvent;
+// CraftBukkit end
+
 public interface CauldronInteraction {
 
     Map<Item, CauldronInteraction> EMPTY = a();
@@ -52,6 +56,11 @@
             return EnumInteractionResult.PASS;
         } else {
             if (!world.isClientSide) {
+                // CraftBukkit start
+                if (!LayeredCauldronBlock.decreaseLevel(iblockdata, world, blockposition, entityhuman, CauldronLevelChangeEvent.ChangeReason.SHULKER_WASH)) {
+                    return EnumInteractionResult.SUCCESS;
+                }
+                // CraftBukkit end
                 ItemStack itemstack1 = new ItemStack(Blocks.SHULKER_BOX);
 
                 if (itemstack.hasTag()) {
@@ -60,7 +69,7 @@
 
                 entityhuman.a(enumhand, itemstack1);
                 entityhuman.a(StatisticList.CLEAN_SHULKER_BOX);
-                LayeredCauldronBlock.e(iblockdata, world, blockposition);
+                // LayeredCauldronBlock.e(iblockdata, world, blockposition); // CraftBukkit
             }
 
             return EnumInteractionResult.a(world.isClientSide);
@@ -71,6 +80,11 @@
             return EnumInteractionResult.PASS;
         } else {
             if (!world.isClientSide) {
+                // CraftBukkit start
+                if (!LayeredCauldronBlock.decreaseLevel(iblockdata, world, blockposition, entityhuman, CauldronLevelChangeEvent.ChangeReason.BANNER_WASH)) {
+                    return EnumInteractionResult.SUCCESS;
+                }
+                // CraftBukkit end
                 ItemStack itemstack1 = itemstack.cloneItemStack();
 
                 itemstack1.setCount(1);
@@ -88,7 +102,7 @@
                 }
 
                 entityhuman.a(StatisticList.CLEAN_BANNER);
-                LayeredCauldronBlock.e(iblockdata, world, blockposition);
+                // LayeredCauldronBlock.e(iblockdata, world, blockposition); // CraftBukkit
             }
 
             return EnumInteractionResult.a(world.isClientSide);
@@ -106,9 +120,14 @@
                 return EnumInteractionResult.PASS;
             } else {
                 if (!world.isClientSide) {
+                    // CraftBukkit start
+                    if (!LayeredCauldronBlock.decreaseLevel(iblockdata, world, blockposition, entityhuman, CauldronLevelChangeEvent.ChangeReason.ARMOR_WASH)) {
+                        return EnumInteractionResult.SUCCESS;
+                    }
+                    // CraftBukkit end
                     idyeable.e_(itemstack);
                     entityhuman.a(StatisticList.CLEAN_ARMOR);
-                    LayeredCauldronBlock.e(iblockdata, world, blockposition);
+                    // LayeredCauldronBlock.e(iblockdata, world, blockposition); // CraftBukkit
                 }
 
                 return EnumInteractionResult.a(world.isClientSide);
@@ -117,7 +136,7 @@
     };
 
     static Object2ObjectOpenHashMap<Item, CauldronInteraction> a() {
-        return (Object2ObjectOpenHashMap) SystemUtils.a((Object) (new Object2ObjectOpenHashMap()), (object2objectopenhashmap) -> {
+        return SystemUtils.a((new Object2ObjectOpenHashMap<>()), (object2objectopenhashmap) -> { // CraftBukkit - decompile error
             object2objectopenhashmap.defaultReturnValue((iblockdata, world, blockposition, entityhuman, enumhand, itemstack) -> {
                 return EnumInteractionResult.PASS;
             });
@@ -133,12 +152,17 @@
                 return EnumInteractionResult.PASS;
             } else {
                 if (!world.isClientSide) {
+                    // CraftBukkit start
+                    if (!LayeredCauldronBlock.changeLevel(iblockdata, world, blockposition, Blocks.WATER_CAULDRON.getBlockData(), entityhuman, CauldronLevelChangeEvent.ChangeReason.BOTTLE_EMPTY)) {
+                        return EnumInteractionResult.SUCCESS;
+                    }
+                    // CraftBukkit end
                     Item item = itemstack.getItem();
 
                     entityhuman.a(enumhand, ItemLiquidUtil.a(itemstack, entityhuman, new ItemStack(Items.GLASS_BOTTLE)));
                     entityhuman.a(StatisticList.USE_CAULDRON);
                     entityhuman.b(StatisticList.ITEM_USED.b(item));
-                    world.setTypeUpdate(blockposition, Blocks.WATER_CAULDRON.getBlockData());
+                    // world.setTypeUpdate(blockposition, Blocks.WATER_CAULDRON.getBlockData()); // CraftBukkit
                     world.playSound((EntityHuman) null, blockposition, SoundEffects.BOTTLE_EMPTY, SoundCategory.BLOCKS, 1.0F, 1.0F);
                     world.a((Entity) null, GameEvent.FLUID_PLACE, blockposition);
                 }
@@ -154,12 +178,17 @@
         });
         CauldronInteraction.WATER.put(Items.GLASS_BOTTLE, (iblockdata, world, blockposition, entityhuman, enumhand, itemstack) -> {
             if (!world.isClientSide) {
+                // CraftBukkit start
+                if (!LayeredCauldronBlock.decreaseLevel(iblockdata, world, blockposition, entityhuman, CauldronLevelChangeEvent.ChangeReason.BOTTLE_FILL)) {
+                    return EnumInteractionResult.SUCCESS;
+                }
+                // CraftBukkit end
                 Item item = itemstack.getItem();
 
                 entityhuman.a(enumhand, ItemLiquidUtil.a(itemstack, entityhuman, PotionUtil.a(new ItemStack(Items.POTION), Potions.WATER)));
                 entityhuman.a(StatisticList.USE_CAULDRON);
                 entityhuman.b(StatisticList.ITEM_USED.b(item));
-                LayeredCauldronBlock.e(iblockdata, world, blockposition);
+                // LayeredCauldronBlock.e(iblockdata, world, blockposition); // CraftBukkit
                 world.playSound((EntityHuman) null, blockposition, SoundEffects.BOTTLE_FILL, SoundCategory.BLOCKS, 1.0F, 1.0F);
                 world.a((Entity) null, GameEvent.FLUID_PICKUP, blockposition);
             }
@@ -169,10 +198,15 @@
         CauldronInteraction.WATER.put(Items.POTION, (iblockdata, world, blockposition, entityhuman, enumhand, itemstack) -> {
             if ((Integer) iblockdata.get(LayeredCauldronBlock.LEVEL) != 3 && PotionUtil.d(itemstack) == Potions.WATER) {
                 if (!world.isClientSide) {
+                    // CraftBukkit start
+                    if (!LayeredCauldronBlock.changeLevel(iblockdata, world, blockposition, iblockdata.a(LayeredCauldronBlock.LEVEL), entityhuman, CauldronLevelChangeEvent.ChangeReason.BOTTLE_EMPTY)) {
+                        return EnumInteractionResult.SUCCESS;
+                    }
+                    // CraftBukkit end
                     entityhuman.a(enumhand, ItemLiquidUtil.a(itemstack, entityhuman, new ItemStack(Items.GLASS_BOTTLE)));
                     entityhuman.a(StatisticList.USE_CAULDRON);
                     entityhuman.b(StatisticList.ITEM_USED.b(itemstack.getItem()));
-                    world.setTypeUpdate(blockposition, (IBlockData) iblockdata.a((IBlockState) LayeredCauldronBlock.LEVEL));
+                    // world.setTypeUpdate(blockposition, (IBlockData) iblockdata.a((IBlockState) LayeredCauldronBlock.LEVEL)); // CraftBukkit
                     world.playSound((EntityHuman) null, blockposition, SoundEffects.BOTTLE_EMPTY, SoundCategory.BLOCKS, 1.0F, 1.0F);
                     world.a((Entity) null, GameEvent.FLUID_PLACE, blockposition);
                 }
@@ -244,12 +278,17 @@
             return EnumInteractionResult.PASS;
         } else {
             if (!world.isClientSide) {
+                // CraftBukkit start
+                if (!LayeredCauldronBlock.changeLevel(iblockdata, world, blockposition, Blocks.CAULDRON.getBlockData(), entityhuman, CauldronLevelChangeEvent.ChangeReason.BUCKET_FILL)) {
+                    return EnumInteractionResult.SUCCESS;
+                }
+                // CraftBukkit end
                 Item item = itemstack.getItem();
 
                 entityhuman.a(enumhand, ItemLiquidUtil.a(itemstack, entityhuman, itemstack1));
                 entityhuman.a(StatisticList.USE_CAULDRON);
                 entityhuman.b(StatisticList.ITEM_USED.b(item));
-                world.setTypeUpdate(blockposition, Blocks.CAULDRON.getBlockData());
+                // world.setTypeUpdate(blockposition, Blocks.CAULDRON.getBlockData()); // CraftBukkit
                 world.playSound((EntityHuman) null, blockposition, soundeffect, SoundCategory.BLOCKS, 1.0F, 1.0F);
                 world.a((Entity) null, GameEvent.FLUID_PICKUP, blockposition);
             }
@@ -260,12 +299,17 @@
 
     static EnumInteractionResult a(World world, BlockPosition blockposition, EntityHuman entityhuman, EnumHand enumhand, ItemStack itemstack, IBlockData iblockdata, SoundEffect soundeffect) {
         if (!world.isClientSide) {
+            // CraftBukkit start
+            if (!LayeredCauldronBlock.changeLevel(iblockdata, world, blockposition, iblockdata, entityhuman, CauldronLevelChangeEvent.ChangeReason.BUCKET_EMPTY)) {
+                return EnumInteractionResult.SUCCESS;
+            }
+            // CraftBukkit end
             Item item = itemstack.getItem();
 
             entityhuman.a(enumhand, ItemLiquidUtil.a(itemstack, entityhuman, new ItemStack(Items.BUCKET)));
             entityhuman.a(StatisticList.FILL_CAULDRON);
             entityhuman.b(StatisticList.ITEM_USED.b(item));
-            world.setTypeUpdate(blockposition, iblockdata);
+            // world.setTypeUpdate(blockposition, iblockdata); // CraftBukkit
             world.playSound((EntityHuman) null, blockposition, soundeffect, SoundCategory.BLOCKS, 1.0F, 1.0F);
             world.a((Entity) null, GameEvent.FLUID_PLACE, blockposition);
         }