diff --git a/pkg/vf3/f3.go b/pkg/vf3/f3.go
index b5b95be1ae..baafa85b31 100644
--- a/pkg/vf3/f3.go
+++ b/pkg/vf3/f3.go
@@ -177,7 +177,7 @@ func (fff *F3) runSigningLoop(ctx context.Context) {
 			clear(alreadyParticipated)
 		}
 
-		participants := fff.leaser.getParticipantsByInstance(mb.Payload.Instance)
+		participants := fff.leaser.getParticipantsByInstance(mb.NetworkName, mb.Payload.Instance)
 		for _, id := range participants {
 			if _, ok := alreadyParticipated[id]; ok {
 				continue
diff --git a/pkg/vf3/participation_lease.go b/pkg/vf3/participation_lease.go
index 70fac54f21..230c5ea026 100644
--- a/pkg/vf3/participation_lease.go
+++ b/pkg/vf3/participation_lease.go
@@ -108,14 +108,25 @@ func (l *leaser) participate(ticket types.F3ParticipationTicket) (types.F3Partic
 	return newLease, nil
 }
 
-func (l *leaser) getParticipantsByInstance(instance uint64) []uint64 {
+func (l *leaser) getParticipantsByInstance(network gpbft.NetworkName, instance uint64) []uint64 {
 	l.mutex.Lock()
 	defer l.mutex.Unlock()
+	currentManifest, _ := l.status()
+	currentNetwork := currentManifest.NetworkName
+	if currentNetwork != network {
+		return nil
+	}
 	var participants []uint64
 	for id, lease := range l.leases {
-		if instance > lease.ToInstance() {
+		if currentNetwork != lease.Network {
+			// Lazily delete any lease that does not belong to network, likely acquired from
+			// prior manifests.
+			delete(l.leases, id)
+			log.Warnf("lost F3 participation lease for miner %d at instance %d due to network mismatch: %s != %s", id, instance, currentNetwork, lease.Network)
+		} else if instance > lease.ToInstance() {
 			// Lazily delete the expired leases.
 			delete(l.leases, id)
+			log.Warnf("lost F3 participation lease for miner %d due to instance (%d) > lease to instance (%d)", id, instance, lease.ToInstance())
 		} else {
 			participants = append(participants, id)
 		}
diff --git a/pkg/vf3/participation_lease_test.go b/pkg/vf3/participation_lease_test.go
index 7cf5e2d335..1510e6a984 100644
--- a/pkg/vf3/participation_lease_test.go
+++ b/pkg/vf3/participation_lease_test.go
@@ -41,18 +41,18 @@ func TestLeaser(t *testing.T) {
 		require.NoError(t, err)
 
 		// Both participants should still be valid.
-		participants := subject.getParticipantsByInstance(11)
+		participants := subject.getParticipantsByInstance(testManifest.NetworkName, 11)
 		require.Len(t, participants, 2)
 		require.Contains(t, participants, uint64(123))
 		require.Contains(t, participants, uint64(456))
 
 		// After instance 16, only participant 456 should be valid.
-		participants = subject.getParticipantsByInstance(16)
+		participants = subject.getParticipantsByInstance(testManifest.NetworkName, 16)
 		require.Len(t, participants, 1)
 		require.Contains(t, participants, uint64(456))
 
 		// After instance 17, no participant must have a lease.
-		participants = subject.getParticipantsByInstance(17)
+		participants = subject.getParticipantsByInstance(testManifest.NetworkName, 17)
 		require.Empty(t, participants)
 	})
 	t.Run("expired ticket", func(t *testing.T) {