diff --git a/docs/ISSUES.md b/docs/ISSUES.md
index 1b6a08d0..c0124423 100644
--- a/docs/ISSUES.md
+++ b/docs/ISSUES.md
@@ -94,6 +94,35 @@ MOTIONDONE loop between `0x8000003C` (stance) and the dispatched motion.
 **Acceptance:** side-by-side with retail — a chasing+attacking Mite Scamp shows
 correct attack-animation variety, correct frequency, and steps/runs (no glide).
 
+**Investigation 2026-07-04 (code-grounded mechanism, HYPOTHESIS — pending live
+confirmation):** traced the live remote path end-to-end. The chase (`mt-6`
+MoveToObject) is owned by the entity's verbatim `MoveToManager`
+(`GameWindow.RouteServerMoveTo`, ~4899) — this is what moves the legs. The
+attacks arrive as SEPARATE `mt-0` InterpretedMotionState UMs and flow through
+`MotionInterpreter.MoveToInterpretedState` (~4985). Two seams make the creature
+glide + over-play:
+1. **Every inbound UM fires the `unpack_movement` head interrupt**
+   (`remoteMot.Motion.InterruptCurrentMovement`, GameWindow ~4893) which is bound
+   to `MoveTo.CancelMoveTo(ActionCancelled)` (GameWindow ~4319). So each `mt-0`
+   attack UM **cancels the active chase MoveTo.**
+2. `MoveToInterpretedState` → `ApplyInterpretedMovement(cancelMoveTo:true)`
+   installs the UM's `ForwardCommand`, which for an attack-only UM defaults to
+   **Ready/idle** (`ims.ForwardCommand = fullMotion`, null/0 → Ready, ~4933) →
+   the run cycle is replaced by idle while the body keeps its dead-reckon
+   translation → **glide**; the creature is repeatedly knocked idle+attack
+   rather than running (over-play / "stuck").
+The `ServerActionStamp` 15-bit gate (`MoveToInterpretedState` ~2845) IS faithfully
+ported, so identical-stamp replays are already suppressed — the "uniform anim" is
+NOT a stamp bug. This coexistence of MoveTo (chase) + interpreted-state (attack)
+is **explicitly R5/MovementManager scope** (GameWindow ~4816 "LoseControlToServer
+autonomy handoff is R5/MovementManager scope"). So #170 sub-bugs 2/3 are
+**downstream of the incomplete MovementManager port (R5-V4), not #159 and not a
+localized bug.** NEXT: (a) confirm with a labelled `ACDREAM_DUMP_MOTION=1` capture
+of the Mite Scamp (exact mt-6/mt-0 interleave + what ForwardCommand + stamps the
+attack UMs carry), (b) retail side-by-side — does retail keep the legs running
+during attacks and re-establish the chase between swings? — then port the retail
+MovementManager coexistence (R5-V4). Do NOT guess a fix in this revert-prone path.
+
 ## #169 — Cold-spawn "hole": world doesn't load / invisible player when spawning far from Holtburg
 
 **Status:** DONE (`9b06a9b8`, 2026-07-03) — root confirmed live via a landblock-load