diff --git a/src/main/java/com/simibubi/create/api/registry/CreateBuiltInRegistries.java b/src/main/java/com/simibubi/create/api/registry/CreateBuiltInRegistries.java
index 036c8afe21..7cee5685a9 100644
--- a/src/main/java/com/simibubi/create/api/registry/CreateBuiltInRegistries.java
+++ b/src/main/java/com/simibubi/create/api/registry/CreateBuiltInRegistries.java
@@ -1,5 +1,6 @@
 package com.simibubi.create.api.registry;
 
+import java.lang.reflect.Field;
 import java.util.HashSet;
 import java.util.Set;
 
@@ -16,12 +17,12 @@ import com.simibubi.create.content.logistics.packagePort.PackagePortTargetType;
 
 import net.minecraft.core.MappedRegistry;
 import net.minecraft.core.Registry;
-import net.minecraft.core.WritableRegistry;
 import net.minecraft.resources.ResourceKey;
 
 import net.neoforged.bus.api.SubscribeEvent;
 import net.neoforged.fml.common.EventBusSubscriber;
 import net.neoforged.fml.common.EventBusSubscriber.Bus;
+import net.neoforged.neoforge.registries.BaseMappedRegistry;
 import net.neoforged.neoforge.registries.NewRegistryEvent;
 
 /**
@@ -51,7 +52,15 @@ public class CreateBuiltInRegistries {
 		return register(new MappedRegistry<>(key, Lifecycle.stable(), true));
 	}
 
-	private static <T> Registry<T> register(WritableRegistry<T> registry) {
+	private static <T> Registry<T> register(MappedRegistry<T> registry) {
+		// TODO - Remove after https://github.com/neoforged/NeoForge/pull/1966 is merged and backported
+		try {
+			Field field = BaseMappedRegistry.class.getDeclaredField("sync");
+			field.setAccessible(true);
+			field.set(registry, true);
+		} catch (Exception ignored) {
+		}
+
 		REGISTRIES.add(registry);
 		return registry;
 	}
@@ -60,5 +69,6 @@ public class CreateBuiltInRegistries {
 	public static void onNewRegistryEvent(NewRegistryEvent event) {
 		for (Registry<?> registry : REGISTRIES)
 			event.register(registry);
+		REGISTRIES.clear();
 	}
 }
diff --git a/src/main/java/com/simibubi/create/content/contraptions/StructureTransform.java b/src/main/java/com/simibubi/create/content/contraptions/StructureTransform.java
index 327abff152..2860f565de 100644
--- a/src/main/java/com/simibubi/create/content/contraptions/StructureTransform.java
+++ b/src/main/java/com/simibubi/create/content/contraptions/StructureTransform.java
@@ -11,6 +11,7 @@ import com.simibubi.create.api.contraption.transformable.TransformableBlock;
 import com.simibubi.create.api.contraption.transformable.TransformableBlockEntity;
 
 import io.netty.buffer.ByteBuf;
+import net.createmod.catnip.codecs.stream.CatnipStreamCodecBuilders;
 import net.createmod.catnip.codecs.stream.CatnipStreamCodecs;
 import net.createmod.catnip.math.VecHelper;
 import net.minecraft.core.BlockPos;
@@ -41,9 +42,9 @@ public class StructureTransform {
 	public static final StreamCodec<ByteBuf, StructureTransform> STREAM_CODEC = StreamCodec.composite(
 	    BlockPos.STREAM_CODEC, i -> i.offset,
 		ByteBufCodecs.INT, i -> i.angle,
-		CatnipStreamCodecs.AXIS, i -> i.rotationAxis,
-	    CatnipStreamCodecs.ROTATION, i -> i.rotation,
-		CatnipStreamCodecs.MIRROR, i -> i.mirror,
+		CatnipStreamCodecBuilders.nullable(CatnipStreamCodecs.AXIS), i -> i.rotationAxis,
+		CatnipStreamCodecBuilders.nullable(CatnipStreamCodecs.ROTATION), i -> i.rotation,
+		CatnipStreamCodecBuilders.nullable(CatnipStreamCodecs.MIRROR), i -> i.mirror,
 	    StructureTransform::new
 	);
 
diff --git a/src/main/java/com/simibubi/create/content/kinetics/base/KineticBlockEntity.java b/src/main/java/com/simibubi/create/content/kinetics/base/KineticBlockEntity.java
index d4a70eec15..687f7d2a4b 100644
--- a/src/main/java/com/simibubi/create/content/kinetics/base/KineticBlockEntity.java
+++ b/src/main/java/com/simibubi/create/content/kinetics/base/KineticBlockEntity.java
@@ -282,7 +282,7 @@ public class KineticBlockEntity extends SmartBlockEntity implements IHaveGoggleI
 	}
 
 	public float getSpeed() {
-		if (overStressed || level.tickRateManager().isFrozen())
+		if (overStressed || (level != null && level.tickRateManager().isFrozen()))
 			return 0;
 		return getTheoreticalSpeed();
 	}