diff --git a/ethereum/core/src/main/java/org/hyperledger/besu/ethereum/vm/AbstractCallOperation.java b/ethereum/core/src/main/java/org/hyperledger/besu/ethereum/vm/AbstractCallOperation.java
index 11f662eec76..a65fa330ecd 100644
--- a/ethereum/core/src/main/java/org/hyperledger/besu/ethereum/vm/AbstractCallOperation.java
+++ b/ethereum/core/src/main/java/org/hyperledger/besu/ethereum/vm/AbstractCallOperation.java
@@ -213,7 +213,7 @@ public OperationResult execute(final MessageFrame frame, final EVM evm) {
               .returnStack(frame.getReturnStack())
               .build();
       frame.incrementRemainingGas(cost);
-      childFrame.mergeWarmedUpFields(frame);
+      childFrame.copyWarmedUpFields(frame);
 
       frame.getMessageFrameStack().addFirst(childFrame);
       frame.setState(MessageFrame.State.CODE_SUSPENDED);
diff --git a/ethereum/core/src/main/java/org/hyperledger/besu/ethereum/vm/MessageFrame.java b/ethereum/core/src/main/java/org/hyperledger/besu/ethereum/vm/MessageFrame.java
index 517c0283f8e..442885b0ae3 100644
--- a/ethereum/core/src/main/java/org/hyperledger/besu/ethereum/vm/MessageFrame.java
+++ b/ethereum/core/src/main/java/org/hyperledger/besu/ethereum/vm/MessageFrame.java
@@ -214,8 +214,8 @@ public enum Type {
   private Gas gasRefund;
   private final Set<Address> selfDestructs;
   private final Map<Address, Wei> refunds;
-  private final Set<Address> warmedUpAddresses;
-  private final Multimap<Address, Bytes32> warmedUpStorage;
+  private Set<Address> warmedUpAddresses;
+  private Multimap<Address, Bytes32> warmedUpStorage;
 
   // Execution Environment fields.
   private final Address recipient;
@@ -858,13 +858,22 @@ public boolean warmUpStorage(final Address address, final Bytes32 slot) {
     return !warmedUpStorage.put(address, slot);
   }
 
+  public void copyWarmedUpFields(final MessageFrame parentFrame) {
+    if (parentFrame == this) {
+      return;
+    }
+
+    warmedUpAddresses = new HashSet<>(parentFrame.warmedUpAddresses);
+    warmedUpStorage = HashMultimap.create(parentFrame.warmedUpStorage);
+  }
+
   public void mergeWarmedUpFields(final MessageFrame childFrame) {
     if (childFrame == this) {
       return;
     }
 
-    warmedUpAddresses.addAll(childFrame.warmedUpAddresses);
-    warmedUpStorage.putAll(childFrame.warmedUpStorage);
+    warmedUpAddresses = childFrame.warmedUpAddresses;
+    warmedUpStorage = childFrame.warmedUpStorage;
   }
 
   /**
diff --git a/ethereum/core/src/main/java/org/hyperledger/besu/ethereum/vm/operations/AbstractCreateOperation.java b/ethereum/core/src/main/java/org/hyperledger/besu/ethereum/vm/operations/AbstractCreateOperation.java
index 794f1c09e51..0296b2d0a13 100644
--- a/ethereum/core/src/main/java/org/hyperledger/besu/ethereum/vm/operations/AbstractCreateOperation.java
+++ b/ethereum/core/src/main/java/org/hyperledger/besu/ethereum/vm/operations/AbstractCreateOperation.java
@@ -149,7 +149,7 @@ private void spawnChildMessage(final MessageFrame frame) {
             .build();
 
     frame.incrementRemainingGas(cost);
-    childFrame.mergeWarmedUpFields(frame);
+    childFrame.copyWarmedUpFields(frame);
 
     frame.getMessageFrameStack().addFirst(childFrame);
     frame.setState(MessageFrame.State.CODE_SUSPENDED);
@@ -165,6 +165,7 @@ private void complete(final MessageFrame frame, final MessageFrame childFrame) {
     frame.popStackItems(getStackItemsConsumed());
 
     if (childFrame.getState() == MessageFrame.State.COMPLETED_SUCCESS) {
+      frame.mergeWarmedUpFields(childFrame);
       frame.pushStackItem(Words.fromAddress(childFrame.getContractAddress()));
     } else {
       frame.setReturnData(childFrame.getOutputData());