diff --git a/CHANGELOG.md b/CHANGELOG.md
index c3d67c7..eaf0e48 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,13 @@ results in CI or internal records. See docs/releasing.md. -->
 
 ## [Unreleased]
 
+## [v4.1.4] - 2026-10-02
+
+### Fixed
+
+- Classify `voteAbciDigest` actions in replica and mempool metrics under their own label and the `governance` category.
+- Read `executed_round` in consensus heartbeats and acknowledgments so updated testnet nodes continue reporting heartbeat delays. Reject malformed, conflicting or duplicate round fields.
+
 ## [v4.1.3] - 2026-09-26
 
 ### Fixed
diff --git a/internal/actiontypes/actiontypes.go b/internal/actiontypes/actiontypes.go
index 6835c73..a844027 100644
--- a/internal/actiontypes/actiontypes.go
+++ b/internal/actiontypes/actiontypes.go
@@ -17,7 +17,7 @@ var known = map[string]struct{}{
 	"trailingStop": {}, "twapCancel": {}, "twapOrder": {}, "updateIsolatedMargin": {}, "updateLeverage": {},
 	"usdClassTransfer": {}, "usdSend": {}, "userSetAbstraction": {}, "userDexAbstraction": {},
 	"ValidatorSignWithdrawalAction": {}, "vaultTransfer": {},
-	"VoteEthFinalizedWithdrawalAction": {}, "voteAppHash": {}, "withdraw3": {},
+	"VoteEthFinalizedWithdrawalAction": {}, "voteAppHash": {}, "voteAbciDigest": {}, "withdraw3": {},
 
 	// Current/retained replica_cmds vocabulary.
 	"activateOutcomeDeployer": {}, "authorizeAqav2Role": {}, "CSignerAction": {},
@@ -66,7 +66,7 @@ func Category(action string) string {
 		"VoteEthFinalizedWithdrawalAction", "VoteGlobalAction", "SetGlobalAction",
 		"CSignerAction", "CValidatorAction", "ValidatorSignWithdrawalAction",
 		"NetChildVaultPositionsAction", "validatorL1UpdateReferenceOracle",
-		"validatorL1Vote", "validatorL1Status", "validatorL1Stream", "voteL1Hash",
+		"validatorL1Vote", "validatorL1Status", "validatorL1Stream", "voteL1Hash", "voteAbciDigest",
 		"l1ValidatorVoteBridgeDeposit", "gossipPriorityBid":
 		return "governance"
 	case "claimRewards", "reserveRequestWeight":
diff --git a/internal/actiontypes/actiontypes_test.go b/internal/actiontypes/actiontypes_test.go
index 4f77ab2..e7f7d96 100644
--- a/internal/actiontypes/actiontypes_test.go
+++ b/internal/actiontypes/actiontypes_test.go
@@ -14,6 +14,7 @@ func TestNormalizeAndCategoryAreBounded(t *testing.T) {
 		{raw: "outcomeDeploy", label: "outcomeDeploy", known: true, category: "deployment"},
 		{raw: "validatorL1UpdateReferenceOracle", label: "validatorL1UpdateReferenceOracle", known: true, category: "governance"},
 		{raw: "validatorL1Status", label: "validatorL1Status", known: true, category: "governance"},
+		{raw: "voteAbciDigest", label: "voteAbciDigest", known: true, category: "governance"},
 		{raw: "noop", label: "noop", known: true, category: "system"},
 		{raw: "random-address-or-payload", label: Other, known: false, category: Other},
 		{raw: "", label: Other, known: false, category: Other},
diff --git a/internal/monitors/consensus_heartbeat_schema_test.go b/internal/monitors/consensus_heartbeat_schema_test.go
new file mode 100644
index 0000000..6e12a06
--- /dev/null
+++ b/internal/monitors/consensus_heartbeat_schema_test.go
@@ -0,0 +1,85 @@
+package monitors
+
+import (
+	"fmt"
+	"testing"
+	"time"
+
+	"github.com/validaoxyz/hyperliquid-exporter/internal/config"
+	"github.com/validaoxyz/hyperliquid-exporter/internal/metrics"
+	"go.opentelemetry.io/otel"
+)
+
+func setupHeartbeatSchemaCounter(t *testing.T) {
+	t.Helper()
+	sentCounter, err := otel.Meter("heartbeat-schema-test").Int64Counter("test_heartbeat_schema_sent")
+	if err != nil {
+		t.Fatal(err)
+	}
+	old := metrics.HLConsensusHeartbeatSentCounter
+	metrics.HLConsensusHeartbeatSentCounter = sentCounter
+	t.Cleanup(func() { metrics.HLConsensusHeartbeatSentCounter = old })
+}
+
+func TestConsensusHeartbeatExecutedRoundJoins(t *testing.T) {
+	setupHeartbeatSchemaCounter(t)
+	for _, fields := range []string{`"executed_round":77`, `"round":77`, `"round":77,"executed_round":77`} {
+		t.Run(fields, func(t *testing.T) {
+			m := NewConsensusMonitor(&config.Config{})
+			sent := fmt.Sprintf(`["2026-10-02T08:15:10.000000000",["out",{"Heartbeat":{"validator":"0x1111..1111","random_id":424,%s}}]]`, fields)
+			ack := fmt.Sprintf(`["2026-10-02T08:15:10.010000000",["in",{"sender":"0x2222..2222","msg":{"HeartbeatAck":{"validator":"0x2222..2222","random_id":424,%s}}}]]`, fields)
+			before := validatorHistogramCount(t, metrics.HLConsensusHeartbeatPeerAckDelay)
+			if err := m.processConsensusLine(sent); err != nil {
+				t.Fatal(err)
+			}
+			if err := m.processConsensusLine(ack); err != nil {
+				t.Fatal(err)
+			}
+			key := heartbeatKey{validator: "0x1111..1111", randomID: 424, round: 77}
+			want := time.Date(2026, 10, 2, 8, 15, 10, 10_000_000, time.UTC)
+			if !m.heartbeats[key].matched || !m.heartbeatAcks[heartbeatAckKey{heartbeatKey: key, source: "0x2222..2222"}].Equal(want) {
+				t.Fatal("heartbeat acknowledgement did not join the sent heartbeat")
+			}
+			if got := validatorHistogramCount(t, metrics.HLConsensusHeartbeatPeerAckDelay) - before; got != 1 {
+				t.Fatalf("peer delay observation count = %d, want 1", got)
+			}
+		})
+	}
+}
+
+func TestConsensusHeartbeatRejectsInvalidRoundAliases(t *testing.T) {
+	setupHeartbeatSchemaCounter(t)
+	for _, fields := range []string{
+		``, `,"executed_round":null`, `,"executed_round":0`, `,"executed_round":-1`,
+		`,"executed_round":"77"`, `,"executed_round":1.5`, `,"executed_round":18446744073709551616`,
+		`,"round":77,"executed_round":78`, `,"round":77,"executed_round":null`,
+		`,"round":77,"executed_round":0`, `,"round":null,"executed_round":77`,
+		`,"round":0,"executed_round":77`, `,"round":"77","executed_round":77`,
+		`,"round":"bad","round":77`, `,"round":"bad","Round":77`,
+		`,"round":77,"round":77`, `,"round":null,"round":77`,
+		`,"executed_round":77,"executed_round":78`,
+		`,"executed_round":77,"Executed_Round":77`,
+		`,"round":77,"executed_round":78,"executed_round":77`,
+	} {
+		for _, kind := range []string{"Heartbeat", "HeartbeatAck"} {
+			t.Run(kind+fields, func(t *testing.T) {
+				m := NewConsensusMonitor(&config.Config{})
+				key := heartbeatKey{validator: "0x1111..1111", randomID: 424, round: 77}
+				if kind == "HeartbeatAck" {
+					m.heartbeats[key] = heartbeatInfo{}
+				}
+				payload := fmt.Sprintf(`{"%s":{"validator":"0x1111..1111","random_id":424%s}}`, kind, fields)
+				inner := `["out",` + payload + `]`
+				if kind == "HeartbeatAck" {
+					inner = `["in",{"sender":"0x1111..1111","msg":` + payload + `}]`
+				}
+				if err := m.processConsensusLine(`["2026-10-02T08:15:10.000000000",` + inner + `]`); err == nil {
+					t.Fatal("accepted an invalid heartbeat round")
+				}
+				if len(m.heartbeatAcks) != 0 || m.heartbeats[key].matched || (kind == "Heartbeat" && len(m.heartbeats) != 0) {
+					t.Fatal("rejected heartbeat changed correlation state")
+				}
+			})
+		}
+	}
+}
diff --git a/internal/monitors/consensus_types.go b/internal/monitors/consensus_types.go
index 157f835..0f8bbc2 100644
--- a/internal/monitors/consensus_types.go
+++ b/internal/monitors/consensus_types.go
@@ -2,6 +2,7 @@ package monitors
 
 import (
 	"encoding/json"
+	"fmt"
 	"time"
 )
 
@@ -56,6 +57,69 @@ type HeartbeatAckMessage struct {
 	Round     uint64 `json:"round"`
 }
 
+func (h *HeartbeatMessage) UnmarshalJSON(data []byte) error {
+	decoded, err := decodeHeartbeat(data)
+	if err != nil {
+		return err
+	}
+	*h = decoded
+	return nil
+}
+
+func (h *HeartbeatAckMessage) UnmarshalJSON(data []byte) error {
+	decoded, err := decodeHeartbeat(data)
+	if err != nil {
+		return err
+	}
+	*h = HeartbeatAckMessage(decoded)
+	return nil
+}
+
+type heartbeatRound struct {
+	value   uint64
+	present bool
+}
+
+func (r *heartbeatRound) UnmarshalJSON(data []byte) error {
+	if r.present {
+		return fmt.Errorf("duplicate heartbeat round")
+	}
+	var value uint64
+	if err := unmarshalRequiredJSON(data, &value); err != nil || value == 0 {
+		return fmt.Errorf("invalid heartbeat round")
+	}
+	r.value, r.present = value, true
+	return nil
+}
+
+// Testnet heartbeats use executed_round from October 2026. Validate each
+// occurrence so duplicate keys cannot hide a malformed or conflicting value.
+func decodeHeartbeat(data []byte) (HeartbeatMessage, error) {
+	var wire struct {
+		Validator     string         `json:"validator"`
+		RandomID      uint64         `json:"random_id"`
+		Round         heartbeatRound `json:"round"`
+		ExecutedRound heartbeatRound `json:"executed_round"`
+	}
+	if err := json.Unmarshal(data, &wire); err != nil {
+		return HeartbeatMessage{}, err
+	}
+	var round uint64
+	for _, field := range []heartbeatRound{wire.Round, wire.ExecutedRound} {
+		if !field.present {
+			continue
+		}
+		if round != 0 && round != field.value {
+			return HeartbeatMessage{}, fmt.Errorf("conflicting heartbeat rounds")
+		}
+		round = field.value
+	}
+	if round == 0 {
+		return HeartbeatMessage{}, fmt.Errorf("missing heartbeat round")
+	}
+	return HeartbeatMessage{Validator: wire.Validator, RandomID: wire.RandomID, Round: round}, nil
+}
+
 // parsed status log line
 type StatusLogEntry struct {
 	Timestamp              string          `json:"-"`
diff --git a/internal/monitors/mempool_txs_monitor_test.go b/internal/monitors/mempool_txs_monitor_test.go
index c93f4b8..141a63a 100644
--- a/internal/monitors/mempool_txs_monitor_test.go
+++ b/internal/monitors/mempool_txs_monitor_test.go
@@ -7,6 +7,18 @@ import (
 	"testing"
 )
 
+func TestParseMempoolTxsClassifiesVoteAbciDigest(t *testing.T) {
+	line := []byte(`["2026-10-02T08:15:10.000000000",{"tx_hash":"constructed","signed_actions":[{"action":{"type":"voteAbciDigest","height":100,"abciDigest":"constructed","signature":"constructed"}},{"action":{"type":"unrecognizedFutureAction"}}]}]`)
+	got, reason, ok := parseMempoolTxsLineDetailed(line)
+	if !ok || reason != "" {
+		t.Fatalf("parse = %v/%s", ok, reason)
+	}
+	want := map[string]int{"voteAbciDigest": 1, "other": 1}
+	if !reflect.DeepEqual(got.actionCounts, want) || !reflect.DeepEqual(got.operationCounts, want) || got.signedActions != 2 || got.operations != 2 || got.parserEvents["unknown_action"] != 1 {
+		t.Fatalf("voteAbciDigest classification or unknown-action reporting is incorrect: %+v", got)
+	}
+}
+
 func TestParseMempoolTxsLine(t *testing.T) {
 	line := []byte(`["2026-06-01T17:59:25.990970382",{"tx_hash":"0xabc","signed_actions":[{"action":{"type":"order","orders":[{"b":true,"t":{"limit":{"tif":"Alo"}}},{"b":false,"t":{"limit":{"tif":"Ioc"}}}]}},{"action":{"type":"batchModify","modifies":[{"order":{"b":true,"t":{"limit":{"tif":"Gtc"}}}},{"order":{"b":false,"t":{"limit":{"tif":"FrontendMarket"}}}}]}},{"action":{"type":"cancel","cancels":[{"a":1,"o":2},{"a":2,"o":3}]}},{"action":{"type":"futureAction"}}]}]`)
 
diff --git a/internal/replica/parser_test.go b/internal/replica/parser_test.go
index 677140b..9f0a3aa 100644
--- a/internal/replica/parser_test.go
+++ b/internal/replica/parser_test.go
@@ -157,6 +157,19 @@ func TestExtractMetricsRejectsZeroActionBundleAndMissingDiscriminant(t *testing.
 	}
 }
 
+func TestExtractMetricsClassifiesVoteAbciDigest(t *testing.T) {
+	p, block := parseReplicaFixture(t, `{"height":100,"abci_block":{"time":"2026-10-02T08:15:10Z","round":200,"proposer":"0x1111..1111","signed_action_bundles":[["bundle",{"signed_actions":[{"action":{"type":"voteAbciDigest","height":100,"abciDigest":"constructed","signature":"constructed"}},{"action":{"type":"unrecognizedFutureAction"}}]}]]}}`)
+	defer p.ReturnBlock(block)
+	got, err := p.ExtractMetrics(block)
+	if err != nil {
+		t.Fatal(err)
+	}
+	want := map[string]int{"voteAbciDigest": 1, "other": 1}
+	if !reflect.DeepEqual(got.ActionCounts, want) || !reflect.DeepEqual(got.OperationCounts, want) || got.TotalActions != 2 || got.TotalOperations != 2 || got.ParserEvents["unknown_action"] != 1 {
+		t.Fatalf("voteAbciDigest classification or unknown-action reporting is incorrect: %+v", got)
+	}
+}
+
 func TestExtractMetricsClassifiesValidatorL1StatusAndRetainsUnknownActions(t *testing.T) {
 	body, err := os.ReadFile("testdata/validator_l1_status.constructed.json")
 	if err != nil {