diff --git a/src/OpenClaw.Connection/ManagedLocalGatewayPortProvenanceService.cs b/src/OpenClaw.Connection/ManagedLocalGatewayPortProvenanceService.cs
index 5222c04bb..25e7824f2 100644
--- a/src/OpenClaw.Connection/ManagedLocalGatewayPortProvenanceService.cs
+++ b/src/OpenClaw.Connection/ManagedLocalGatewayPortProvenanceService.cs
@@ -358,7 +358,10 @@ cached.ProcessStartTimeUtc is not DateTime expectedStart ||
             return false;
         }
 
-        return _platform.IsExpectedWslGatewayListening(managedDistroName, uri.Port);
+        if (!_platform.IsExpectedWslGatewayListening(managedDistroName, uri.Port))
+            return false;
+
+        return ListenerSnapshotStillCurrent(current, uri);
     }
 
     private GatewayEndpointProvenance InspectCore(GatewayRecord record)
diff --git a/tests/OpenClaw.Connection.Tests/ManagedLocalGatewayPortProvenanceServiceTests.cs b/tests/OpenClaw.Connection.Tests/ManagedLocalGatewayPortProvenanceServiceTests.cs
index cccca6506..4dd85bfd2 100644
--- a/tests/OpenClaw.Connection.Tests/ManagedLocalGatewayPortProvenanceServiceTests.cs
+++ b/tests/OpenClaw.Connection.Tests/ManagedLocalGatewayPortProvenanceServiceTests.cs
@@ -381,6 +381,27 @@ public void InteractiveCredentialGate_GuestSocketOwnershipChanges_FailsClosed()
         Assert.False(service.IsStrongCredentialAllowed(gateway, credential));
     }
 
+    [Fact]
+    public void InteractiveCredentialGate_CachedWslRelayReplacedDuringGuestProbe_FailsClosed()
+    {
+        var platform = new FakePlatform();
+        var start = new DateTime(2026, 7, 24, 1, 0, 0, DateTimeKind.Utc);
+        platform.Listeners.Add(new WindowsTcpListenerInfo(
+            IPAddress.Loopback, 18789, 102, "wslrelay",
+            @"C:\Program Files\WSL\wslrelay.exe", start));
+        var service = new ManagedLocalGatewayPortProvenanceService(platform, NullLogger.Instance);
+        var gateway = ManagedRecord();
+        var credential = new GatewayCredential(
+            "shared-token", false, CredentialResolver.SourceSharedGatewayToken);
+        Assert.Equal(GatewayEndpointProvenanceKind.ExpectedManagedGateway, service.Inspect(gateway).Kind);
+
+        Assert.True(service.IsStrongCredentialAllowed(gateway, credential));
+
+        platform.ReplaceListenerDuringGuestProof = true;
+
+        Assert.False(service.IsStrongCredentialAllowed(gateway, credential));
+    }
+
     [Fact]
     public void InteractiveCredentialGate_RelaylessProofRevalidatesEmptySnapshotAndGuestOwner()
     {
@@ -561,6 +582,7 @@ private sealed class FakePlatform : IManagedLocalGatewayPortPlatform
         public bool ReplaceProcessIdentityOnEnd { get; set; }
         public bool ReplaceOwnerOnSecondCapture { get; set; }
         public bool IntroduceUnknownListenerDuringGuestProof { get; set; }
+        public bool ReplaceListenerDuringGuestProof { get; set; }
         public bool Ipv4Complete { get; set; } = true;
         public bool Ipv6Complete { get; set; } = true;
         public int TrustedWslRelayChecks { get; private set; }
@@ -648,6 +670,19 @@ public bool IsExpectedWslGatewayListening(string distroName, int port)
                     "unknown",
                     @"C:\unknown.exe"));
             }
+
+            if (ReplaceListenerDuringGuestProof && Listeners.Count > 0)
+            {
+                ReplaceListenerDuringGuestProof = false;
+                Listeners[0] = new WindowsTcpListenerInfo(
+                    Listeners[0].Address,
+                    port,
+                    999,
+                    "unknown",
+                    @"C:\unknown.exe",
+                    Listeners[0].ProcessStartTimeUtc?.AddSeconds(1));
+            }
+
             return ExpectedDistroListening;
         }
         public string? ReadScheduledTaskXml(string taskName) => TaskXml;