diff --git a/build-data/additional-spigot-member-mappings.csrg b/build-data/additional-spigot-member-mappings.csrg
index 962d83c9a2..33f15ea1ca 100644
--- a/build-data/additional-spigot-member-mappings.csrg
+++ b/build-data/additional-spigot-member-mappings.csrg
@@ -20,3 +20,8 @@ net/minecraft/world/entity/npc/EntityVillagerAbstract fD ()Lnet/minecraft/world/
 
 # BehaviorWorkComposter -> BehaviorWork
 net/minecraft/world/entity/ai/behavior/BehaviorWorkComposter a (Lnet/minecraft/server/level/WorldServer;Lnet/minecraft/world/entity/npc/EntityVillager;)V doWork
+
+# We add getLevel to the Hopper interface (implemented by Hoppers and Hopper Minecarts), but this also exists on BlockEntity,
+# which Hoppers also extend. We need to map the method we add to the Hopper interface to the same name used for the method on BlockEntity
+# to avoid remap causing issues
+net/minecraft/world/level/block/entity/IHopper getWorld ()Lnet/minecraft/world/level/World; getLevel
diff --git a/patches/server/0349-Optimize-Hoppers.patch b/patches/server/0349-Optimize-Hoppers.patch
index d68d9a0355..1ec55ab1c3 100644
--- a/patches/server/0349-Optimize-Hoppers.patch
+++ b/patches/server/0349-Optimize-Hoppers.patch
@@ -43,6 +43,24 @@ index f00839eab02277bf10b742c88fadc4aa9e89e7e0..312be2221e1acc44aaf6936533b0eb96
  
              this.profiler.push(() -> {
                  return worldserver + " " + worldserver.dimension().location();
+diff --git a/src/main/java/net/minecraft/world/entity/vehicle/MinecartHopper.java b/src/main/java/net/minecraft/world/entity/vehicle/MinecartHopper.java
+index 449d2e7b18608ca36282f1a29e69457fc525307e..c738cb0433ea4a86d82372bf66e29c01f991d2c6 100644
+--- a/src/main/java/net/minecraft/world/entity/vehicle/MinecartHopper.java
++++ b/src/main/java/net/minecraft/world/entity/vehicle/MinecartHopper.java
+@@ -68,6 +68,13 @@ public class MinecartHopper extends AbstractMinecartContainer implements Hopper
+         this.enabled = enabled;
+     }
+ 
++    // Paper start - add back getLevel
++    @Override
++    public net.minecraft.world.level.Level getLevel() {
++        return this.level;
++    }
++    // Paper end
++
+     @Override
+     public double getLevelX() {
+         return this.getX();
 diff --git a/src/main/java/net/minecraft/world/item/ItemStack.java b/src/main/java/net/minecraft/world/item/ItemStack.java
 index dd4deb08eb3ed15a156269a11d3d43abfd61fe5b..10f55ba189d12c46e0ef38b0b96a29894b4fba93 100644
 --- a/src/main/java/net/minecraft/world/item/ItemStack.java
@@ -84,14 +102,14 @@ index 8a079ee3ed243fd19b1dd7eed2de1dd33785faa1..c3a07ccccd5cc38552363c82398f432c
          }
  
 diff --git a/src/main/java/net/minecraft/world/level/block/entity/Hopper.java b/src/main/java/net/minecraft/world/level/block/entity/Hopper.java
-index a05acf709735b40ca86f978508c63a86065fd405..c1754df6a60ff93d75a28145b9dc4e9174241a21 100644
+index a05acf709735b40ca86f978508c63a86065fd405..71dd26ca6626631b94d53818cd06b93f61485369 100644
 --- a/src/main/java/net/minecraft/world/level/block/entity/Hopper.java
 +++ b/src/main/java/net/minecraft/world/level/block/entity/Hopper.java
 @@ -14,6 +14,10 @@ public interface Hopper extends Container {
          return SUCK;
      }
  
-+    net.minecraft.world.level.Level getLevel();
++    net.minecraft.world.level.Level getLevel(); // Paper
 +
 +    default net.minecraft.core.BlockPos getBlockPosition() { return new net.minecraft.core.BlockPos(getLevelX(), getLevelY(), getLevelZ()); } // Paper
 +
diff --git a/patches/server/0466-Support-old-UUID-format-for-NBT.patch b/patches/server/0466-Support-old-UUID-format-for-NBT.patch
index 0418f312a1..9fd9265bf0 100644
--- a/patches/server/0466-Support-old-UUID-format-for-NBT.patch
+++ b/patches/server/0466-Support-old-UUID-format-for-NBT.patch
@@ -46,7 +46,7 @@ index 1aa3af8c7714b2c850fb4264c863db8e639e6284..2a805d6bbeede50898d36258976ff25e
          return tag != null && tag.getType() == IntArrayTag.TYPE && ((IntArrayTag)tag).getAsIntArray().length == 4;
      }
 diff --git a/src/main/java/net/minecraft/nbt/NbtUtils.java b/src/main/java/net/minecraft/nbt/NbtUtils.java
-index 57c9575a9714acb95d9dced672955a96d71dfd1e..dc136cd4d5d4ba1e0e53a7187b3a2e836e185c19 100644
+index 57c9575a9714acb95d9dced672955a96d71dfd1e..06fe97e05608fc21f90c9884d745d910beb6883d 100644
 --- a/src/main/java/net/minecraft/nbt/NbtUtils.java
 +++ b/src/main/java/net/minecraft/nbt/NbtUtils.java
 @@ -40,14 +40,14 @@ import org.apache.logging.log4j.LogManager;
@@ -78,3 +78,23 @@ index 57c9575a9714acb95d9dced672955a96d71dfd1e..dc136cd4d5d4ba1e0e53a7187b3a2e83
          if (compound.hasUUID("Id")) {
              uUID = compound.getUUID("Id");
          }
+@@ -495,7 +500,7 @@ public final class NbtUtils {
+     }
+ 
+     public static CompoundTag update(DataFixer fixer, DataFixTypes fixTypes, CompoundTag compound, int oldVersion, int targetVersion) {
+-        return fixer.update(fixTypes.getType(), new Dynamic<>(NbtOps.INSTANCE, compound), oldVersion, targetVersion).getValue();
++        return (CompoundTag) fixer.update(fixTypes.getType(), new com.mojang.serialization.Dynamic<>(NbtOps.INSTANCE, compound), oldVersion, targetVersion).getValue(); // Paper - decompile fix
+     }
+ 
+     public static Component toPrettyComponent(Tag element) {
+@@ -620,8 +625,8 @@ public final class NbtUtils {
+             CompoundTag compoundTag2 = new CompoundTag();
+             if (i + 2 <= string.length()) {
+                 String string3 = string.substring(i + 1, string.indexOf(125, i));
+-                COMMA_SPLITTER.split(string3).forEach((string2) -> {
+-                    List<String> list = COLON_SPLITTER.splitToList(string2);
++                COMMA_SPLITTER.split(string3).forEach(it -> { // Paper - decompile fix
++                    List<String> list = COLON_SPLITTER.splitToList(it); // Paper - decompile fix
+                     if (list.size() == 2) {
+                         compoundTag2.putString(list.get(0), list.get(1));
+                     } else {