diff --git a/src/routing_layer/nat_detection.c b/src/routing_layer/nat_detection.c
index eb96ab03..77f4fb1f 100644
--- a/src/routing_layer/nat_detection.c
+++ b/src/routing_layer/nat_detection.c
@@ -1514,6 +1514,15 @@ void nat_detection_set_allow_local(struct NAT_DETECTION *detector, int allow) {
 
 void nat_detection_set_automatic(struct NAT_DETECTION *detector, int automatic) {
     if (!detector) return;
+    if (automatic && !detector->automatic) {
+        uint64_t now = get_time_tb();
+        for (struct nat_socket *state = detector->sockets; state; state = state->next) {
+            if (state->phase || state->cycling ||
+                (state->measured_profile.source == ADDRESS_SOURCE_ETCP && state->measured_profile.mapping && state->measured_profile.inbound))
+                continue;
+            state->cold_until = now + NAT_ROUND_TB + 2500; state->due = now + 2500;
+        }
+    }
     detector->automatic = !!automatic;
     detector->reservation_dirty = 1;
     DEBUG_INFO(DEBUG_CATEGORY_NAT, "NAT automatic endpoint measurements %s", automatic ? "enabled" : "disabled");
diff --git a/tests/stream_netns/nat_scenario.py b/tests/stream_netns/nat_scenario.py
index 18c2f606..c13b86fc 100644
--- a/tests/stream_netns/nat_scenario.py
+++ b/tests/stream_netns/nat_scenario.py
@@ -62,6 +62,7 @@ def check_profiles(scenario):
     verified = {}
     for owner in public + [node for node in NODES if node.nat]:
         observer = second if owner.name == first.name else first
+        agents[owner.name].rpc("nat_auto", enabled=1)
         if not scenario.args.tcp_only:
             contacts = set(profile(agents[owner.name].rpc("stats"), "udp")["contacts"])
             helper = next((node for node in public if node.name not in {owner.name, observer.name} and node.ip not in contacts), None)
@@ -103,6 +104,7 @@ def check_profiles(scenario):
             print(f"NAT {owner.name}/{protocol}: {actual['mapping']} / {actual['inbound']}"
                   f" external={actual['external'] or '-'} reason={actual['reason']}", flush=True)
         verified[owner.name] = observed
+        agents[owner.name].rpc("nat_auto", enabled=0)
         (scenario.network.directory / "nat-profiles.json").write_text(json.dumps(verified, indent=2) + "\n")
 
     # Повтор на использовавшемся порту сохраняет mapping, но не обновляет OPEN