diff --git a/core/src/main/java/google/registry/model/poll/PollMessage.java b/core/src/main/java/google/registry/model/poll/PollMessage.java
index 76625581f..edc91594d 100644
--- a/core/src/main/java/google/registry/model/poll/PollMessage.java
+++ b/core/src/main/java/google/registry/model/poll/PollMessage.java
@@ -406,17 +406,20 @@ public abstract class PollMessage extends ImmutableObject
                     pendingActionNotificationResponse.processedDate));
       }
       if (contactId != null && transferResponse != null) {
-        contactTransferResponses =
-            ImmutableList.of(
-                new ContactTransferResponse.Builder()
-                    .setContactId(contactId)
-                    .setGainingClientId(transferResponse.getGainingClientId())
-                    .setLosingClientId(transferResponse.getLosingClientId())
-                    .setTransferStatus(transferResponse.getTransferStatus())
-                    .setTransferRequestTime(transferResponse.getTransferRequestTime())
-                    .setPendingTransferExpirationTime(
-                        transferResponse.getPendingTransferExpirationTime())
-                    .build());
+        // The transferResponse is currently an unspecialized TransferResponse instance, create a
+        // ContactTransferResponse so that the value is consistently specialized and store it in the
+        // list representation for datastore.
+        transferResponse =
+            new ContactTransferResponse.Builder()
+                .setContactId(contactId)
+                .setGainingClientId(transferResponse.getGainingClientId())
+                .setLosingClientId(transferResponse.getLosingClientId())
+                .setTransferStatus(transferResponse.getTransferStatus())
+                .setTransferRequestTime(transferResponse.getTransferRequestTime())
+                .setPendingTransferExpirationTime(
+                    transferResponse.getPendingTransferExpirationTime())
+                .build();
+        contactTransferResponses = ImmutableList.of((ContactTransferResponse) transferResponse);
       }
     }
 
diff --git a/core/src/test/java/google/registry/flows/contact/ContactTransferApproveFlowTest.java b/core/src/test/java/google/registry/flows/contact/ContactTransferApproveFlowTest.java
index 35d00b4df..c519dae15 100644
--- a/core/src/test/java/google/registry/flows/contact/ContactTransferApproveFlowTest.java
+++ b/core/src/test/java/google/registry/flows/contact/ContactTransferApproveFlowTest.java
@@ -41,14 +41,21 @@ import google.registry.model.transfer.TransferData;
 import google.registry.model.transfer.TransferResponse;
 import google.registry.model.transfer.TransferStatus;
 import google.registry.testing.DualDatabaseTest;
+import google.registry.testing.ReplayExtension;
 import google.registry.testing.TestOfyAndSql;
 import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Order;
+import org.junit.jupiter.api.extension.RegisterExtension;
 
 /** Unit tests for {@link ContactTransferApproveFlow}. */
 @DualDatabaseTest
 class ContactTransferApproveFlowTest
     extends ContactTransferFlowTestCase<ContactTransferApproveFlow, ContactResource> {
 
+  @Order(value = Order.DEFAULT - 2)
+  @RegisterExtension
+  final ReplayExtension replayExtension = ReplayExtension.createWithCompare(clock);
+
   @BeforeEach
   void setUp() {
     setEppInput("contact_transfer_approve.xml");