diff --git a/docs/ISSUES.md b/docs/ISSUES.md
index 1dc8147..bce9fec 100644
--- a/docs/ISSUES.md
+++ b/docs/ISSUES.md
@@ -665,9 +665,19 @@ int animFrame0Parts = ae.Animation?.PartFrames.Count > 0
 
 ---
 
-## #61 — AnimationSequencer link→cycle boundary flash on one-shot motion (door swing)
+## #61 — [DONE 2026-05-18 · `9f069e1`] AnimationSequencer link→cycle boundary flash on one-shot motion (door swing)
+
+**Status:** DONE — fixed by `9f069e1` (also widened scope: same bug
+manifested as the local-player run-stop twitch — user-observed during
+the M2 anim-pass session). Root cause was `BuildBlendedFrame` wrapping
+`nextIdx` to `rangeLo` unconditionally at the high-frame boundary —
+correct for looping cycles (idle/run/walk loops), wrong for one-shot
+links. During the ~30 ms fractional tail of any link, the renderer
+blended `frame[end]` with `frame[0]`, producing the flash through the
+anim's starting pose. Fix: gate the wrap on `curr.IsLooping`. Pinned by
+the new `Advance_LinkTailDoesNotBlendIntoLinkFrame0` regression test.
+Visual-verified by the user end-to-end on 2026-05-18.
 
-**Status:** OPEN
 **Severity:** LOW (visual polish — animation works, brief one-frame flash through prior pose at end of swing)
 **Filed:** 2026-05-13 (visual test of B.4c)
 **Component:** animation / `AcDream.Core.Physics.AnimationSequencer` link+cycle transition