diff --git a/common/txmgr/inmemory_store.go b/common/txmgr/inmemory_store.go
index bd4e9a2f3a6..c609201ba61 100644
--- a/common/txmgr/inmemory_store.go
+++ b/common/txmgr/inmemory_store.go
@@ -5,6 +5,7 @@ import (
 	"errors"
 	"fmt"
 	"math/big"
+	"sync"
 	"time"
 
 	"github.com/google/uuid"
@@ -47,7 +48,8 @@ type inMemoryStore[
 	keyStore          txmgrtypes.KeyStore[ADDR, CHAIN_ID, SEQ]
 	persistentTxStore txmgrtypes.TxStore[ADDR, CHAIN_ID, TX_HASH, BLOCK_HASH, R, SEQ, FEE]
 
-	addressStates map[ADDR]*addressState[CHAIN_ID, ADDR, TX_HASH, BLOCK_HASH, R, SEQ, FEE]
+	addressStatesLock sync.RWMutex
+	addressStates     map[ADDR]*addressState[CHAIN_ID, ADDR, TX_HASH, BLOCK_HASH, R, SEQ, FEE]
 }
 
 // NewInMemoryStore returns a new inMemoryStore
@@ -215,6 +217,23 @@ func (ms *inMemoryStore[CHAIN_ID, ADDR, TX_HASH, BLOCK_HASH, R, SEQ, FEE]) Updat
 
 // UpdateTxsUnconfirmed updates the unconfirmed transactions for a given set of ids
 func (ms *inMemoryStore[CHAIN_ID, ADDR, TX_HASH, BLOCK_HASH, R, SEQ, FEE]) UpdateTxsUnconfirmed(ctx context.Context, txIDs []int64) error {
+	// Persist to persistent storage
+	if err := ms.persistentTxStore.UpdateTxsUnconfirmed(ctx, txIDs); err != nil {
+		return err
+	}
+
+	// Update in memory store
+	ms.addressStatesLock.RLock()
+	defer ms.addressStatesLock.RUnlock()
+
+	for _, as := range ms.addressStates {
+		for _, txID := range txIDs {
+			if err := as.moveConfirmedMissingReceiptToUnconfirmed(txID); err != nil {
+				continue
+			}
+		}
+	}
+
 	return nil
 }
 
diff --git a/core/chains/evm/txmgr/evm_inmemory_store_test.go b/core/chains/evm/txmgr/evm_inmemory_store_test.go
index a102ee1c996..dd4334093bb 100644
--- a/core/chains/evm/txmgr/evm_inmemory_store_test.go
+++ b/core/chains/evm/txmgr/evm_inmemory_store_test.go
@@ -1,14 +1,76 @@
 package txmgr_test
 
 import (
+	"math/big"
 	"testing"
+	"time"
 
+	"github.com/ethereum/go-ethereum/common"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 
+	"github.com/smartcontractkit/chainlink-common/pkg/logger"
+	commontxmgr "github.com/smartcontractkit/chainlink/v2/common/txmgr"
+	txmgrcommon "github.com/smartcontractkit/chainlink/v2/common/txmgr"
+
+	evmgas "github.com/smartcontractkit/chainlink/v2/core/chains/evm/gas"
 	evmtxmgr "github.com/smartcontractkit/chainlink/v2/core/chains/evm/txmgr"
+	evmtypes "github.com/smartcontractkit/chainlink/v2/core/chains/evm/types"
+	"github.com/smartcontractkit/chainlink/v2/core/internal/cltest"
+	"github.com/smartcontractkit/chainlink/v2/core/internal/testutils"
+	"github.com/smartcontractkit/chainlink/v2/core/internal/testutils/evmtest"
+	"github.com/smartcontractkit/chainlink/v2/core/internal/testutils/pgtest"
 )
 
+func TestInMemoryStore_UpdateTxsUnconfirmed(t *testing.T) {
+	t.Parallel()
+
+	t.Run("successfully updates transactions to unconfirmed", func(t *testing.T) {
+		db := pgtest.NewSqlxDB(t)
+		_, dbcfg, evmcfg := evmtxmgr.MakeTestConfigs(t)
+		persistentStore := cltest.NewTestTxStore(t, db)
+		kst := cltest.NewKeyStore(t, db, dbcfg)
+		_, fromAddress := cltest.MustInsertRandomKey(t, kst.Eth())
+
+		ethClient := evmtest.NewEthClientMockWithDefaultChain(t)
+		lggr := logger.TestSugared(t)
+		chainID := ethClient.ConfiguredChainID()
+		ctx := testutils.Context(t)
+
+		inMemoryStore, err := commontxmgr.NewInMemoryStore[
+			*big.Int,
+			common.Address, common.Hash, common.Hash,
+			*evmtypes.Receipt,
+			evmtypes.Nonce,
+			evmgas.EvmFee,
+		](ctx, lggr, chainID, kst.Eth(), persistentStore, evmcfg.Transactions())
+		require.NoError(t, err)
+
+		// Insert a transaction into persistent store
+		originalBroadcastAt := time.Unix(1616509100, 0)
+		inTx := mustInsertConfirmedMissingReceiptEthTxWithLegacyAttempt(
+			t, persistentStore, 0, 1, originalBroadcastAt, fromAddress)
+		assert.Equal(t, txmgrcommon.TxConfirmedMissingReceipt, inTx.State)
+		// Insert the transaction into the in-memory store
+		require.NoError(t, inMemoryStore.XXXTestInsertTx(fromAddress, &inTx))
+
+		// Update the transaction to unconfirmed
+		require.NoError(t, inMemoryStore.UpdateTxsUnconfirmed(ctx, []int64{inTx.ID}))
+
+		expTx, err := persistentStore.FindTxWithAttempts(ctx, inTx.ID)
+		require.NoError(t, err)
+		assert.Equal(t, commontxmgr.TxUnconfirmed, expTx.State)
+		assert.Equal(t, 1, len(expTx.TxAttempts))
+
+		fn := func(tx *evmtxmgr.Tx) bool { return true }
+		actTxs := inMemoryStore.XXXTestFindTxs(nil, fn, inTx.ID)
+		require.Equal(t, 1, len(actTxs))
+		actTx := actTxs[0]
+		assertTxEqual(t, expTx, actTx)
+		assert.Equal(t, commontxmgr.TxUnconfirmed, actTx.State)
+	})
+}
+
 // assertTxEqual asserts that two transactions are equal
 func assertTxEqual(t *testing.T, exp, act evmtxmgr.Tx) {
 	assert.Equal(t, exp.ID, act.ID)