diff --git a/components/scenario-form.jsx b/components/scenario-form.jsx
index d2f3864..9ff4b64 100644
--- a/components/scenario-form.jsx
+++ b/components/scenario-form.jsx
@@ -225,7 +225,7 @@ export default function ScenarioForm() {
 
   /* ── RTO.25A — passive late-result branch switcher (experimental) ── */
 
-  const [activeBranchId, setActiveBranchId] = useState("branch-b");
+  const [activeBranchId, setActiveBranchId] = useState("branch-a");
   // Pre-seed Competitor development with a late result for RTO.27A testing
   const [branchNewResults, setBranchNewResults] = useState({ "branch-a": true });
 
@@ -457,7 +457,7 @@ export default function ScenarioForm() {
   return (
     <div className="space-y-6">
       {/* ── RTO.26B — standalone branch-scoped experimental view (shown when experiment is active) ───── */}
-      {showExperimentView && status !== "loading" && (
+      {showExperimentView && status !== "loading" && (result?.situationGraph || status === "success") && (
         <>
           <PulseStyle />
           <div className="grid grid-cols-1 gap-6 lg:grid-cols-4">
@@ -518,18 +518,6 @@ export default function ScenarioForm() {
               />
             </div>
           </div>
-          {/* ── RTO.27B — simulated late update for paused branch (experimental dev control) ─ */}
-          <div className="mt-2 flex items-center gap-3">
-            <button
-              onClick={() => {
-                // Simulate a late result arriving on the customer-demand branch while paused
-                setBranchNewResults(prev => ({ ...prev, "branch-b": true }));
-              }}
-              className="rounded border border-purple-200/60 bg-purple-50 px-3 py-1.5 text-xs text-purple-700 hover:bg-purple-100 transition"
-            >
-              Simulate late update on Customer demand
-            </button>
-          </div>
         </>
       )}