diff --git a/mesh/net-keys.c b/mesh/net-keys.c
index 6f1758f..683a924 100644
--- a/mesh/net-keys.c
+++ b/mesh/net-keys.c
@@ -410,7 +410,6 @@ static void snb_timeout(struct l_timeout *timeout, void *user_data)
 	}
 
 	interval = key->snb.observe_period / 2;
-	key->snb.ts = get_timestamp_secs();
 	key->snb.half_period = !key->snb.half_period;
 
 	if (key->beacon_enables)
@@ -425,8 +424,20 @@ void net_key_beacon_seen(uint32_t id)
 {
 	struct net_key *key = l_queue_find(keys, match_id, L_UINT_TO_PTR(id));
 
-	if (key)
+	if (key) {
 		key->snb.observed++;
+		key->snb.ts = get_timestamp_secs();
+	}
+}
+
+uint32_t net_key_beacon_last_seen(uint32_t id)
+{
+	struct net_key *key = l_queue_find(keys, match_id, L_UINT_TO_PTR(id));
+
+	if (key)
+		return key->snb.ts;
+
+	return 0;
 }
 
 void net_key_beacon_enable(uint32_t id)
@@ -451,7 +462,6 @@ void net_key_beacon_enable(uint32_t id)
 	rand_ms++;
 
 	/* Enable Periodic Beaconing on this key */
-	key->snb.ts = get_timestamp_secs();
 	key->snb.observe_period = BEACON_INTERVAL_MIN * 2;
 	key->snb.expected = 2;
 	key->snb.observed = 0;
diff --git a/mesh/net-keys.h b/mesh/net-keys.h
index 3c2c4d0..9385e2c 100644
--- a/mesh/net-keys.h
+++ b/mesh/net-keys.h
@@ -39,3 +39,4 @@ void net_key_beacon_seen(uint32_t id);
 void net_key_beacon_enable(uint32_t id);
 bool net_key_beacon_refresh(uint32_t id, uint32_t iv_index, bool kr, bool ivu);
 void net_key_beacon_disable(uint32_t id);
+uint32_t net_key_beacon_last_seen(uint32_t id);
diff --git a/mesh/net.c b/mesh/net.c
index 5aeeab1..23565c1 100644
--- a/mesh/net.c
+++ b/mesh/net.c
@@ -3662,7 +3662,22 @@ void mesh_net_set_prov(struct mesh_net *net, struct mesh_prov *prov)
 	net->prov = prov;
 }
 
+static void refresh_instant(void *a, void *b)
+{
+	struct mesh_subnet *subnet = a;
+	struct mesh_net *net = b;
+	uint32_t instant = net_key_beacon_last_seen(subnet->net_key_tx);
+
+	if (net->instant < instant)
+		net->instant = instant;
+}
+
 uint32_t mesh_net_get_instant(struct mesh_net *net)
 {
+	if (!net)
+		return 0;
+
+	l_queue_foreach(net->subnets, refresh_instant, net);
+
 	return net->instant;
 }