diff --git a/crates/ml/src/trainers/dqn/trainer/training_loop.rs b/crates/ml/src/trainers/dqn/trainer/training_loop.rs
index d4f8d5ccc..00bdd6b66 100644
--- a/crates/ml/src/trainers/dqn/trainer/training_loop.rs
+++ b/crates/ml/src/trainers/dqn/trainer/training_loop.rs
@@ -8013,6 +8013,17 @@ impl DQNTrainer {
                     );
                 }
             }
+            "sp14_q_disagreement_variance_ema" => {
+                if let Some(ref fused) = self.fused_ctx {
+                    use crate::cuda_pipeline::sp14_isv_slots::{
+                        Q_DISAGREEMENT_VARIANCE_EMA_INDEX, SENTINEL_VARIANCE,
+                    };
+                    fused.trainer().write_isv_signal_at(
+                        Q_DISAGREEMENT_VARIANCE_EMA_INDEX,
+                        SENTINEL_VARIANCE,
+                    );
+                }
+            }
             // SP14 Layer C Phase C.1 (2026-05-08): named-state reset
             // arms for the 9 deleted α-machinery slots
             // (sp14_k_aux_adaptive, sp14_k_q_adaptive,
diff --git a/docs/dqn-wire-up-audit.md b/docs/dqn-wire-up-audit.md
index e5a85501e..7a31cbbfa 100644
--- a/docs/dqn-wire-up-audit.md
+++ b/docs/dqn-wire-up-audit.md
@@ -2,6 +2,12 @@
 
 **Status:** Populated during Plan 1 Task 6 (A.5 orphan audit). Updated on every commit per Invariant 7.
 
+## 2026-05-08 — SP14 Layer C Phase C.10 prep: missing reset_named_state dispatch arm
+
+**Bug:** train-rqd8r (commit `10e647c14`) failed both folds at fold-reset boundary with `unknown name 'sp14_q_disagreement_variance_ema'`. C.1's atomic α deletion preserved the slot constant `Q_DISAGREEMENT_VARIANCE_EMA_INDEX=389` (HEALTH_DIAG diagnostic) and its `state_reset_registry` entry, but the corresponding `match` arm in `reset_named_state` was missing — even though the inline comment block at training_loop.rs:8024 falsely claimed it existed.
+
+**Fix:** Added the missing arm using `SENTINEL_VARIANCE` (0.0) per the registry entry's documented sentinel. Same class as SP5 Layer A bug-fix #281. No other Welford-EMA slot was deleted, so this is the only missing FoldReset dispatch.
+
 ## 2026-05-08 — SP14 Layer C Phases C.8 + C.9: ISV-driven Adam hyperparams (already complete) + synthetic smoke test
 
 ### C.8 — ISV-driven aux trunk Adam β1/β2/ε/LR/grad-clip