diff --git a/FerroUI b/FerroUI
index c4c4cf8..b753739 160000
--- a/FerroUI
+++ b/FerroUI
@@ -1 +1 @@
-Subproject commit c4c4cf872a3f57166ebb00b343ca4b6c41a55eef
+Subproject commit b753739811c34eba24c86ec383232053e914e42e
diff --git a/crates/ferrodesign-app/src/app.rs b/crates/ferrodesign-app/src/app.rs
index 80b1f11..95690d9 100644
--- a/crates/ferrodesign-app/src/app.rs
+++ b/crates/ferrodesign-app/src/app.rs
@@ -51,7 +51,7 @@ impl ApplicationImpl for App {
                 if let Some(shell) = weak.upgrade() {
                     if !shell.command("commit-edit") { event.set_cancel(true); }
                 }
-            });
+            }).detach();
             desktop.set_main_window(Some(window));
         }
         SHELL.with(|slot| *slot.borrow_mut() = Some(shell));
diff --git a/crates/ferrodesign-app/src/prototype.rs b/crates/ferrodesign-app/src/prototype.rs
index b6b2845..8b05892 100644
--- a/crates/ferrodesign-app/src/prototype.rs
+++ b/crates/ferrodesign-app/src/prototype.rs
@@ -8,7 +8,7 @@ use ferrodesign_core::{
     PrototypeScene, PrototypeTimer, Transition, TransitionKind, Trigger, Viewport, MAX_DOCUMENT_DEPTH,
 };
 use ferroui_base::animation::{Clock, IClock, PlayState, TimeSpan};
-use ferroui_base::reactive::{AnonymousObserver, IDisposable, IObservable};
+use ferroui_base::reactive::{AnonymousObserver, IDisposable, IObservable, Subscription};
 use ferroui_base::threading::{DispatcherPriority, DispatcherTimer};
 use ferroui_base::Ref;
 use std::{
@@ -53,7 +53,7 @@ struct AuthoredSnapshot {
 }
 
 struct ScheduledTimer {
-    subscription: Rc<dyn IDisposable>,
+    subscription: Subscription,
 }
 
 pub struct PrototypeRuntime {
diff --git a/crates/ferrodesign-app/src/shell.rs b/crates/ferrodesign-app/src/shell.rs
index f00847f..0e2d192 100644
--- a/crates/ferrodesign-app/src/shell.rs
+++ b/crates/ferrodesign-app/src/shell.rs
@@ -33,7 +33,7 @@ use ferroui_base::layout::{Orientation, VerticalAlignment};
 use ferroui_base::media::{FontWeight, TextWrapping};
 use ferroui_base::metadata::from_markup_value;
 use ferroui_base::utilities::{Uri, UriKind};
-use ferroui_base::reactive::IDisposable;
+use ferroui_base::reactive::{IDisposable, Subscription};
 use ferroui_base::threading::{DispatcherPriority, DispatcherTimer};
 use std::time::{Duration, Instant};
 use ferroui_base::{BoxedValue, ObjectType, Ref, Thickness, WeakRef};
@@ -72,7 +72,7 @@ pub struct EditorShell {
     prototype_targets: RefCell<Vec<NodeId>>,
     prototype: Rc<PrototypeRuntime>,
     pending_save: Cell<bool>,
-    pending_save_timer: RefCell<Option<Rc<dyn IDisposable>>>,
+    pending_save_timer: RefCell<Option<Subscription>>,
     save_serializations: Cell<u64>,
     last_serialization_ms: Cell<f64>,
     scene_frames: Cell<u64>,