diff --git a/main.py b/main.py
index 4c3078c..159ce7b 100644
--- a/main.py
+++ b/main.py
@@ -522,4 +522,4 @@ def render_sidebar(state: AppState, dual_pane: dict):
 if _shared_db is not None:
     register_api_routes(_shared_db)
 
-ui.run(title='AI Settings Manager', port=8080, reload=True, reload_includes=['*.py'])
+ui.run(title='AI Settings Manager', port=8080, reload=False)
diff --git a/tab_comfy_ng.py b/tab_comfy_ng.py
index 3c4c359..c2bcc18 100644
--- a/tab_comfy_ng.py
+++ b/tab_comfy_ng.py
@@ -82,15 +82,18 @@ def render_comfy_monitor(state: AppState):
     _live_refreshables = state._live_refreshables
 
     def poll_all():
-        timeout_val = config.get('monitor_timeout', 0)
-        if timeout_val > 0:
-            for key, start_time in list(state.live_toggles.items()):
-                if start_time and (time.time() - start_time) > (timeout_val * 60):
-                    state.live_toggles[key] = None
-                    if key in _live_checkboxes:
-                        _live_checkboxes[key].set_value(False)
-                    if key in _live_refreshables:
-                        _live_refreshables[key].refresh()
+        try:
+            timeout_val = config.get('monitor_timeout', 0)
+            if timeout_val > 0:
+                for key, start_time in list(state.live_toggles.items()):
+                    if start_time and (time.time() - start_time) > (timeout_val * 60):
+                        state.live_toggles[key] = None
+                        if key in _live_checkboxes:
+                            _live_checkboxes[key].set_value(False)
+                        if key in _live_refreshables:
+                            _live_refreshables[key].refresh()
+        except RuntimeError:
+            pass  # Parent slot deleted during refresh
 
     ui.timer(300, poll_all)
 
diff --git a/tab_timeline_ng.py b/tab_timeline_ng.py
index bc618ed..0721d09 100644
--- a/tab_timeline_ng.py
+++ b/tab_timeline_ng.py
@@ -437,6 +437,8 @@ def render_timeline_tab(state: AppState):
     render_timeline()
 
     # --- Poll for graph node clicks (JS → Python bridge) ---
+    graph_timer = None
+
     async def _poll_graph_click():
         if view_mode.value == 'Linear Log':
             return
@@ -446,6 +448,9 @@ def render_timeline_tab(state: AppState):
                 'window.graphSelectedNode = null; v;'
             )
         except Exception:
+            # Deactivate timer if parent slot was deleted
+            if graph_timer is not None:
+                graph_timer.active = False
             return
         if not result:
             return
@@ -458,7 +463,7 @@ def render_timeline_tab(state: AppState):
         selected['node_id'] = node_id
         render_timeline.refresh()
 
-    ui.timer(0.2, _poll_graph_click)
+    graph_timer = ui.timer(0.2, _poll_graph_click)
 
 
 def _render_graphviz(dot_source: str, selected_node_id: str | None = None):