Second Approach to Fix #5420

src/main/java/com/simibubi/create/content/contraptions/Contraption.java

@@ -1144,6 +1144,8 @@ public void addBlocksToWorld(Level world, StructureTransform transform) {
 
 		translateMultiblockControllers(transform);
 
+		SingleBlockServerLevel popChamber = null;
+
 		for (boolean nonBrittles : Iterate.trueAndFalse) {
 			for (StructureBlockInfo block : blocks.values()) {
 				if (nonBrittles == BlockMovementChecks.isBrittle(block.state()))
@@ -1167,8 +1169,22 @@ public void addBlocksToWorld(Level world, StructureTransform transform) {
 					.isEmpty())) {
 					if (targetPos.getY() == world.getMinBuildHeight())
 						targetPos = targetPos.above();
+
+					if(popChamber == null && world instanceof ServerLevel serverWorld)
+						popChamber = new SingleBlockServerLevel(serverWorld);
+
+					if(popChamber != null){
+						popChamber.setBlock(targetPos, state, Block.UPDATE_NONE);
+						BlockEntity be = popChamber.getBlockEntity(targetPos);
+						if (be != null) {
+							CompoundTag tag = block.nbt();
+							tag = NBTProcessors.process(state, be, tag, false);
+							if (tag != null)
+								be.load(tag);
+						}
+						popChamber.destroyBlock(targetPos, true);
+					}
 					world.levelEvent(2001, targetPos, Block.getId(state));
-					Block.dropResources(state, world, targetPos, null);
 					continue;
 				}
 				if (state.getBlock() instanceof SimpleWaterloggedBlock

src/main/java/com/simibubi/create/content/contraptions/SingleBlockServerLevel.java

@@ -0,0 +1,56 @@
+package com.simibubi.create.content.contraptions;
+
+import javax.annotation.Nullable;
+
+import net.createmod.catnip.levelWrappers.WrappedServerLevel;
+import net.minecraft.core.BlockPos;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.world.entity.Entity;
+import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.level.block.Block;
+import net.minecraft.world.level.block.Blocks;
+import net.minecraft.world.level.block.EntityBlock;
+import net.minecraft.world.level.block.entity.BlockEntity;
+import net.minecraft.world.level.block.state.BlockState;
+
+public class SingleBlockServerLevel extends WrappedServerLevel {
+
+	public BlockState blockState;
+	public @Nullable BlockEntity blockEntity;
+
+	public SingleBlockServerLevel(ServerLevel level) {
+		super(level);
+		blockState = Blocks.AIR.defaultBlockState();
+		blockEntity = null;
+	}
+
+	@Override
+	public boolean setBlock(BlockPos pos, BlockState newState, int flags) {
+		blockState.onRemove(this, pos, newState, (flags & 64) != 0);
+		blockState = newState;
+		blockEntity = null;
+		return true;
+	}
+
+	@Override
+	public BlockState getBlockState(BlockPos pos) {
+		return blockState;
+	}
+
+	@Nullable
+	public BlockEntity getBlockEntity(BlockPos pos) {
+		if (blockState.hasBlockEntity() && blockEntity == null)
+			blockEntity = ((EntityBlock) blockState.getBlock()).newBlockEntity(pos, blockState);
+		return blockEntity;
+	}
+
+	@Override
+	public boolean destroyBlock(BlockPos pos, boolean dropBlock, @Nullable Entity entity, int recursionLeft){
+		if (blockState.isAir())
+			return false;
+		if (dropBlock)
+			Block.dropResources(blockState, this, pos, blockEntity, entity, ItemStack.EMPTY);
+		setBlock(pos, Blocks.AIR.defaultBlockState(), Block.UPDATE_NONE);
+		return true;
+	}
+}