diff --git a/quest/m0/README.md b/quest/m0/README.md
index 97a0b31..de50a99 100644
--- a/quest/m0/README.md
+++ b/quest/m0/README.md
@@ -109,6 +109,7 @@ repository.
 - [moq-audio's browser backends are pinned](/quest/m0/pin-browser-audio.md) - the web studio's audio slice
 - [moq-audio's source tap is pinned](/quest/m0/pin-audio-tap.md) - the samples clap-to-measure sync times a clap from
 - [moq-audio's strip pan is pinned](/quest/m0/pin-audio-pan.md) - the bus strip pan the studio's pan sets
+- [A replayed media file never repeats a timestamp](/quest/m0/media-replay-timestamps.md) - a media source that starts over publishes strictly increasing timestamps, and its flaky test passes every run
 
 ## Related
 
diff --git a/quest/m0/media-replay-timestamps.md b/quest/m0/media-replay-timestamps.md
new file mode 100644
index 0000000..ec72a1b
--- /dev/null
+++ b/quest/m0/media-replay-timestamps.md
@@ -0,0 +1,25 @@
+# [S] A replayed media file never repeats a timestamp
+
+## Goal
+
+A media source that starts over while on program publishes its pictures with
+strictly increasing timestamps every time, and
+`publish::tests::a_media_file_is_published_on_one_timeline`
+(`rs/moq-scene/src/publish.rs`) passes on every run.
+
+## Plan
+
+Planned 2026-11-07 (maintainer, /quest-complete): ✅ m0 (rejected: m1), since
+the test is in `just test`, so it flakes the merge gate for every PR, and the
+repeat may reach viewers. ✅ A quest of its own (rejected: fixing it in the moq
+pin bump, [moq-dev/studio#104](https://github.com/moq-dev/studio/pull/104)).
+
+The test fails about half its runs with two equal timestamps in a row: 4 of 8
+on `main` at d42fd70, 3 of 6 after the bump to moq 079a646. It came with
+[moq-dev/studio#44](https://github.com/moq-dev/studio/pull/44); name that PR
+under `## Caused by` if the bug is in its code. The test runs on a paused
+clock, so the variation comes from work outside it, such as the encoder's
+thread, racing the restart (`feed.play()`). Reproduce it first, then find
+whether the published track can repeat a picture's time at a restart (a real
+bug) or only the test reads too early, and fix that root cause rather than
+retry or loosen the assertion.