diff --git a/app/src/main/java/app/closer/core/navigation/AppNavigation.kt b/app/src/main/java/app/closer/core/navigation/AppNavigation.kt
index 0a86fed2..27290d1a 100644
--- a/app/src/main/java/app/closer/core/navigation/AppNavigation.kt
+++ b/app/src/main/java/app/closer/core/navigation/AppNavigation.kt
@@ -590,7 +590,10 @@ private val shellBackRoutes = setOf(
     AppRoute.THIS_OR_THAT,
     AppRoute.HOW_WELL,
     AppRoute.DESIRE_SYNC,
-    AppRoute.CONNECTION_CHALLENGES,
+    // NB: CONNECTION_CHALLENGES is intentionally NOT here — that screen renders its OWN
+    // header (title + "Pick a series…" subtitle + back) for both the pick and active views.
+    // Adding it to the shell set drew a SECOND "Connection Challenges" app bar + back arrow
+    // on top of the screen's own (C-CC-001 duplicate header / double back).
     AppRoute.WAITING_FOR_PARTNER,
     AppRoute.SUBSCRIPTION,
     AppRoute.WHEEL_HISTORY,