diff --git a/src/AcDream.App/Composition/LivePresentationComposition.cs b/src/AcDream.App/Composition/LivePresentationComposition.cs
index b3396241..d6802e3d 100644
--- a/src/AcDream.App/Composition/LivePresentationComposition.cs
+++ b/src/AcDream.App/Composition/LivePresentationComposition.cs
@@ -1078,10 +1078,15 @@ internal sealed class LivePresentationCompositionPhase
         // Campaign CH slice CH2: the SpewBox is retail's OTHER on-screen
         // interface-text surface (research doc §1.1/§7.3/§7.4) — modeled
         // directly on the PortalWaitNoticeController lease immediately
-        // above, wired into the same retained-UI host.
+        // above, wired into the same retained-UI host. Like the wait notice
+        // in its no-tunnel arm, the transferred controller is reclaimed by
+        // the retained-UI root's own teardown (its Dispose only detaches
+        // children from that root).
+        CompositionAcquisitionScope.CompositionAcquisitionLease<
+            SpewBoxController>? spewBoxLease = null;
         if (interaction.RetainedUi is { } spewBoxRetainedUi)
         {
-            scope.Acquire(
+            spewBoxLease = scope.Acquire(
                 "spew box",
                 () => new SpewBoxController(
                     spewBoxRetainedUi.Host.Root,
@@ -1300,6 +1305,7 @@ internal sealed class LivePresentationCompositionPhase
         portalDepthLease.Transfer();
         portalTunnelLease?.Transfer();
         portalWaitNoticeLease?.Transfer();
+        spewBoxLease?.Transfer();
         skyLease.Transfer();
         particleLease.Transfer();
         bindingsLease.Transfer();