diff --git a/docs/architecture/performance-journeys.md b/docs/architecture/performance-journeys.md
index c2e61aa69..cc211beb1 100644
--- a/docs/architecture/performance-journeys.md
+++ b/docs/architecture/performance-journeys.md
@@ -1445,9 +1445,12 @@ Not enforced, with the reason:
 - J3 `renderer.cdTicksToPlaying` (7 or 8) and J4
   `renderer.cdTicksToResults` (10 or 11): not identical even zoneless; the
   player's and the search debounce's events land in one or two ticks. J1
-  `renderer.cdTicksToFirstCard` (5), `renderer.cdTicksIdle30s` (3) and J2
-  `renderer.cdTicksToFirstPage` (9) are enforced since the zoneless flip
-  (#1929), identical in all 15 iterations of its three dispatched runs.
+  `renderer.cdTicksIdle30s` (3) and J2 `renderer.cdTicksToFirstPage` (9) are
+  enforced exactly since the zoneless flip (#1929), identical in all 15
+  iterations of its three dispatched runs. J1 `renderer.cdTicksToFirstCard`
+  read 5 in those 15 too, but after #1931 moved Angular Material off the
+  startup path one iteration in six read 6: the lazy chunk resolves on either
+  side of a render. It is enforced at 5 with `slack: 1`.
 - J2 `renderer.domMutationsToFirstPage`: 1,602 or 1,603 between runs of
   recent commits.
 - J3 `renderer.ipcCallsToPlaying` (4 or 5) and
diff --git a/docs/architecture/zoneless-migration.md b/docs/architecture/zoneless-migration.md
index 4833bd5e7..29df7c239 100644
--- a/docs/architecture/zoneless-migration.md
+++ b/docs/architecture/zoneless-migration.md
@@ -307,7 +307,8 @@ Build `electron-performance` and run the journeys as described in
 `renderer.cdTicksToFirstPage` and `renderer.cdTicksToPlaying` before and
 after. Until the flip, while zone.js was on, removing Eager did not change
 the number of ticks, only the work per tick. Since the flip (#1929)
-`renderer.cdTicksToFirstCard` (5), `renderer.cdTicksIdle30s` (3) and
+`renderer.cdTicksToFirstCard` (5, with one tick of slack for the lazy
+Material chunk since #1931), `renderer.cdTicksIdle30s` (3) and
 `renderer.cdTicksToFirstPage` (9) are ratchet baselines: a change that adds a
 tick to launch, to the idle dashboard or to opening a source fails the
 journeys job.
diff --git a/tools/performance/journey-baselines.json b/tools/performance/journey-baselines.json
index ce7c6cecf..e08e48e0d 100644
--- a/tools/performance/journey-baselines.json
+++ b/tools/performance/journey-baselines.json
@@ -61,7 +61,8 @@
             "renderer.cdTicksToFirstCard": {
                 "value": 5,
                 "unit": "ticks",
-                "slack": 0,
+                "slack": 1,
+                "note": "one-tick race since #1931 moved Angular Material off the startup path: 5 in all 15 iterations of the three dispatched runs before it, 5, 5, 5, 5, 6 in #1929's journeys job after merging it (https://github.com/4gray/iptvnator/actions/runs/38476954719/job/115583649036)",
                 "updatedAt": "2026-10-13",
                 "evidencePr": 1929,
                 "evidenceRun": "https://github.com/4gray/iptvnator/actions/runs/38359088033",