diff --git a/documentation/audits/night-burndown-2026-10-05/hub-docker-firstseen-red-proof.txt b/documentation/audits/night-burndown-2026-10-05/hub-docker-firstseen-red-proof.txt
new file mode 100644
index 00000000..e2709a16
--- /dev/null
+++ b/documentation/audits/night-burndown-2026-10-05/hub-docker-firstseen-red-proof.txt
@@ -0,0 +1,7 @@
+[INFO] [store] app-update event types added to 0 household(s)' notification prefs (one-time, add-only): []
+[INFO] [store] app_stopped_unhealthy added to 0 household(s)' notification prefs (one-time, add-only): []
+--- FAIL: TestEvaluate_StampsDockerFirstSeenWithoutAPageView (0.05s)
+    docker_firstseen_test.go:33: two healthy nights after the set was first seen on the tick, yet: "hp has 0 of 2 healthy night Docker step(s) with this set" (first seen 2026-10-06 13:01:00 +0000 UTC)
+FAIL
+FAIL	gitea.dooplex.hu/admin/felhom-hub/internal/osupdates	0.052s
+FAIL
diff --git a/hub/CHANGELOG.md b/hub/CHANGELOG.md
index 41d9e4c2..194cc1cf 100644
--- a/hub/CHANGELOG.md
+++ b/hub/CHANGELOG.md
@@ -25,6 +25,10 @@ first:** `felhom-hub -unseal-box-secrets` in the running pod (see R-879 below an
   hashes. Empty hash (older agent) = unknown, never drift.
 - **R-276 (hub half):** deleting a host asks the WireGuard peer sync for an immediate full-list push (as the customer
   delete does since R-600), so the off-site endpoint drops the removed box's peer at once instead of on the next tick.
+- **Fixed without a row:** the Docker engine set's „first seen" is stamped by the evaluate tick like the other layers
+  — it was stamped only when someone opened the System page, so healthy nights before that view did not count (found
+  through a flaky `TestSystemPage_DockerButtonOnlyWhenReady`, which now runs on a fixed clock). Test
+  `TestEvaluate_StampsDockerFirstSeenWithoutAPageView`; red-proved (without the call: „0 of 2 healthy night").
 - **scripts:** `wire_contract_gate.py` checks the mirrored escrow roots field by field and prints each root's check
   (R-315); `hub_copy_gate.py` accepts the controller gate importing the shared vocabulary (R-325, felhom.eu half);
   `reuse_refs_check.py` checks `.md` citations (R-422); the instructions gate's decoy is in the suite, exemptions 20 → 16
diff --git a/hub/internal/osupdates/docker_firstseen_test.go b/hub/internal/osupdates/docker_firstseen_test.go
new file mode 100644
index 00000000..db59409d
--- /dev/null
+++ b/hub/internal/osupdates/docker_firstseen_test.go
@@ -0,0 +1,38 @@
+package osupdates
+
+import (
+	"testing"
+	"time"
+)
+
+// The Docker set's "first seen" is stamped by the evaluate tick, not by a page view: two healthy night Docker steps that
+// happen while nobody opens the System page count. Before 2026-10-05 the stamp was taken only by DockerStatus on the
+// page, so nights before the first view were lost (and the page test flaked on a second boundary).
+// Red-proof: drop the DockerStatus call from Evaluate — the final status still waits ("0 of 2" / "1 of 2").
+func TestEvaluate_StampsDockerFirstSeenWithoutAPageView(t *testing.T) {
+	f := newFix(t)
+	f.s.DockerNights = 2
+	set := []Package{{Name: "docker-ce", Version: "5:29.8.2-1", Origin: "Docker"}}
+	f.reportL(t, "hp", LayerDocker, "debug", true, set...)
+	f.reportL(t, "n100", LayerDocker, "debug", true, set...)
+	f.now = f.now.Add(time.Minute)
+	if _, err := f.s.Evaluate(); err != nil { // the tick: no page view anywhere in this test
+		t.Fatal(err)
+	}
+	for i := 0; i < 2; i++ {
+		f.now = f.now.Add(24 * time.Hour)
+		f.reportL(t, "hp", LayerDocker, "night", true, set...)
+		f.reportL(t, "n100", LayerDocker, "night", true, set...)
+	}
+	f.now = f.now.Add(time.Hour)
+	st, err := f.s.DockerStatus() // the operator opens the page for the first time only now
+	if err != nil {
+		t.Fatal(err)
+	}
+	if st.Waiting != "" {
+		t.Fatalf("two healthy nights after the set was first seen on the tick, yet: %q (first seen %s)", st.Waiting, st.FirstSeen)
+	}
+	if st.FirstSeen.IsZero() {
+		t.Fatalf("no first-seen stamp: %+v", st)
+	}
+}
diff --git a/hub/internal/osupdates/service.go b/hub/internal/osupdates/service.go
index a5c21b45..a28cc2c1 100644
--- a/hub/internal/osupdates/service.go
+++ b/hub/internal/osupdates/service.go
@@ -392,6 +392,13 @@ func (s *Service) Evaluate() ([]Status, error) {
 		}
 		out = append(out, st)
 	}
+	// The Docker set approves only by the operator's button, but its "first seen" must still be stamped on the tick
+	// like the other layers: otherwise it was stamped only when someone opened the System page, and the healthy
+	// nights before that view did not count (found 2026-10-05, a flaky TestSystemPage_DockerButtonOnlyWhenReady).
+	// Pinned by TestEvaluate_StampsDockerFirstSeenWithoutAPageView.
+	if _, err := s.DockerStatus(); err != nil {
+		return out, err
+	}
 	return out, nil
 }
 
diff --git a/hub/internal/web/system_test.go b/hub/internal/web/system_test.go
index a1b8016f..53d95a1b 100644
--- a/hub/internal/web/system_test.go
+++ b/hub/internal/web/system_test.go
@@ -76,6 +76,10 @@ func TestSystemPage_DockerButtonOnlyWhenReady(t *testing.T) {
 		t.Fatal("button shown with no Docker candidate")
 	}
 	_ = st.SetOSRing("full-1", 0)
+	// A fixed clock: on the real one the page's first-seen stamp could fall one second after the first night's report
+	// and drop it (the flake seen 2026-10-05 under full-suite load).
+	clock := time.Date(2026, 10, 5, 3, 0, 0, 0, time.UTC)
+	svc.Now = func() time.Time { return clock }
 	night := func() {
 		if err := svc.Ingest("full-1", osupdates.Report{RunID: time.Now().String(), Layer: "docker", Trigger: "night", Mode: "apply",
 			Outcome: "nothing", Healthy: true, Installed: []osupdates.Package{{Name: "docker-ce", Version: "5:29.8.2-1", Origin: "Docker"}}}); err != nil {