diff --git a/LanMountainDesktop/Views/Components/StudyEnvironmentWidget.axaml.cs b/LanMountainDesktop/Views/Components/StudyEnvironmentWidget.axaml.cs
index aa85f1d..42388d0 100644
--- a/LanMountainDesktop/Views/Components/StudyEnvironmentWidget.axaml.cs
+++ b/LanMountainDesktop/Views/Components/StudyEnvironmentWidget.axaml.cs
@@ -64,8 +64,16 @@ public partial class StudyEnvironmentWidget : UserControl, IDesktopComponentWidg
     public void SetDesktopPageContext(bool isOnActivePage, bool isEditMode)
     {
         _ = isEditMode;
+        var wasOnActivePage = _isOnActivePage;
         _isOnActivePage = isOnActivePage;
+        
         UpdateMonitoringLeaseState();
+        
+        if (isOnActivePage && !wasOnActivePage)
+        {
+            RefreshVisual();
+        }
+        
         UpdateTimerState();
     }
 
@@ -116,8 +124,7 @@ public partial class StudyEnvironmentWidget : UserControl, IDesktopComponentWidg
 
     private void UpdateMonitoringLeaseState()
     {
-        var shouldMonitor = _isAttached && _isOnActivePage;
-        if (shouldMonitor)
+        if (_isAttached)
         {
             _monitoringLease ??= _monitoringLeaseCoordinator.AcquireLease();
             return;
diff --git a/LanMountainDesktop/Views/Components/StudyNoiseCurveWidget.axaml.cs b/LanMountainDesktop/Views/Components/StudyNoiseCurveWidget.axaml.cs
index 90d0140..b0cc36d 100644
--- a/LanMountainDesktop/Views/Components/StudyNoiseCurveWidget.axaml.cs
+++ b/LanMountainDesktop/Views/Components/StudyNoiseCurveWidget.axaml.cs
@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Globalization;
 using Avalonia;
@@ -11,7 +11,7 @@ using LanMountainDesktop.Theme;
 
 namespace LanMountainDesktop.Views.Components;
 
-public partial class StudyNoiseCurveWidget : UserControl, IDesktopComponentWidget, IDesktopPageVisibilityAwareComponentWidget
+public partial class StudyNoiseCurveWidget : UserControl, IDesktopComponentWidget, IDesktopPageVisibilityAwareComponentWidget, IDisposable
 {
     private const double NormalTextMinContrast = 4.5;
     private const double LargeTextMinContrast = 4.5;
@@ -69,6 +69,7 @@ public partial class StudyNoiseCurveWidget : UserControl, IDesktopComponentWidge
     private bool _isAttached;
     private bool _isOnActivePage = true;
     private bool _isSubscribed;
+    private bool _isDisposed;
     private int _framesSinceCompaction;
     private IDisposable? _monitoringLease;
 
@@ -131,8 +132,20 @@ public partial class StudyNoiseCurveWidget : UserControl, IDesktopComponentWidge
     public void SetDesktopPageContext(bool isOnActivePage, bool isEditMode)
     {
         _ = isEditMode;
+        var wasOnActivePage = _isOnActivePage;
         _isOnActivePage = isOnActivePage;
+        
         UpdateMonitoringLeaseState();
+        
+        if (isOnActivePage && !wasOnActivePage)
+        {
+            lock (_snapshotSync)
+            {
+                _pendingSnapshot = _studyAnalyticsService.GetSnapshot();
+                _hasPendingSnapshot = true;
+            }
+        }
+        
         UpdateRenderLoopState();
     }
 
@@ -231,8 +244,7 @@ public partial class StudyNoiseCurveWidget : UserControl, IDesktopComponentWidge
 
     private void UpdateMonitoringLeaseState()
     {
-        var shouldMonitor = _isAttached && _isOnActivePage;
-        if (shouldMonitor)
+        if (_isAttached)
         {
             _monitoringLease ??= _monitoringLeaseCoordinator.AcquireLease();
             return;
@@ -553,4 +565,29 @@ public partial class StudyNoiseCurveWidget : UserControl, IDesktopComponentWidge
     {
         return _localizationService.GetString(_languageCode, key, fallback);
     }
+
+    public void Dispose()
+    {
+        if (_isDisposed)
+        {
+            return;
+        }
+
+        _isDisposed = true;
+
+        _renderTimer.Stop();
+        _renderTimer.Tick -= OnRenderTimerTick;
+        AttachedToVisualTree -= OnAttachedToVisualTree;
+        DetachedFromVisualTree -= OnDetachedFromVisualTree;
+        SizeChanged -= OnSizeChanged;
+
+        if (_isSubscribed)
+        {
+            _studyAnalyticsService.SnapshotUpdated -= OnStudySnapshotUpdated;
+            _isSubscribed = false;
+        }
+
+        _monitoringLease?.Dispose();
+        _monitoringLease = null;
+    }
 }
diff --git a/LanMountainDesktop/Views/Components/StudyNoiseDistributionWidget.axaml.cs b/LanMountainDesktop/Views/Components/StudyNoiseDistributionWidget.axaml.cs
index b171f4f..e413649 100644
--- a/LanMountainDesktop/Views/Components/StudyNoiseDistributionWidget.axaml.cs
+++ b/LanMountainDesktop/Views/Components/StudyNoiseDistributionWidget.axaml.cs
@@ -93,8 +93,16 @@ public partial class StudyNoiseDistributionWidget : UserControl, IDesktopCompone
     public void SetDesktopPageContext(bool isOnActivePage, bool isEditMode)
     {
         _ = isEditMode;
+        var wasOnActivePage = _isOnActivePage;
         _isOnActivePage = isOnActivePage;
+        
         UpdateMonitoringLeaseState();
+        
+        if (isOnActivePage && !wasOnActivePage)
+        {
+            RefreshVisual();
+        }
+        
         UpdateTimerState();
     }
 
@@ -143,8 +151,7 @@ public partial class StudyNoiseDistributionWidget : UserControl, IDesktopCompone
 
     private void UpdateMonitoringLeaseState()
     {
-        var shouldMonitor = _isAttached && _isOnActivePage;
-        if (shouldMonitor)
+        if (_isAttached)
         {
             _monitoringLease ??= _monitoringLeaseCoordinator.AcquireLease();
             return;
diff --git a/LanMountainDesktop/Views/Components/StudySessionHistoryWidget.axaml.cs b/LanMountainDesktop/Views/Components/StudySessionHistoryWidget.axaml.cs
index 6a624b3..0991cda 100644
--- a/LanMountainDesktop/Views/Components/StudySessionHistoryWidget.axaml.cs
+++ b/LanMountainDesktop/Views/Components/StudySessionHistoryWidget.axaml.cs
@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Globalization;
 using Avalonia;
@@ -15,7 +15,7 @@ using LanMountainDesktop.Theme;
 
 namespace LanMountainDesktop.Views.Components;
 
-public partial class StudySessionHistoryWidget : UserControl, IDesktopComponentWidget, IDesktopPageVisibilityAwareComponentWidget
+public partial class StudySessionHistoryWidget : UserControl, IDesktopComponentWidget, IDesktopPageVisibilityAwareComponentWidget, IDisposable
 {
     private const double MinTextContrast = 4.5;
     private enum HistoryDialogMode
@@ -55,6 +55,7 @@ public partial class StudySessionHistoryWidget : UserControl, IDesktopComponentW
     private bool _isAttached;
     private bool _isOnActivePage = true;
     private bool _isSubscribed;
+    private bool _isDisposed;
     private bool _isCompactMode;
     private bool _isUltraCompactMode;
     private string? _loadingSessionId;
@@ -733,6 +734,29 @@ public partial class StudySessionHistoryWidget : UserControl, IDesktopComponentW
 
         return min;
     }
+
+    public void Dispose()
+    {
+        if (_isDisposed)
+        {
+            return;
+        }
+
+        _isDisposed = true;
+
+        AttachedToVisualTree -= OnAttachedToVisualTree;
+        DetachedFromVisualTree -= OnDetachedFromVisualTree;
+        SizeChanged -= OnSizeChanged;
+        DialogCancelButton.Click -= (_, _) => CloseDialog();
+        DialogConfirmButton.Click -= (_, _) => ConfirmDialog();
+        DialogRenameTextBox.KeyDown -= OnDialogRenameTextBoxKeyDown;
+
+        if (_isSubscribed)
+        {
+            _studyAnalyticsService.SnapshotUpdated -= OnStudySnapshotUpdated;
+            _isSubscribed = false;
+        }
+    }
 }
 
 
diff --git a/LanMountainDesktop/Views/MainWindow.ComponentSystem.cs b/LanMountainDesktop/Views/MainWindow.ComponentSystem.cs
index 2e5379b..7fe3edc 100644
--- a/LanMountainDesktop/Views/MainWindow.ComponentSystem.cs
+++ b/LanMountainDesktop/Views/MainWindow.ComponentSystem.cs
@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using Avalonia;
@@ -681,23 +681,33 @@ public partial class MainWindow
         }
 
         ClearTimeZoneServiceBindings(_selectedDesktopComponentHost);
+        DisposeComponentIfNeeded(_selectedDesktopComponentHost);
 
         if (_desktopPageComponentGrids.TryGetValue(placement.PageIndex, out var pageGrid))
         {
             pageGrid.Children.Remove(_selectedDesktopComponentHost);
         }
 
-        // Remove from persisted placement list as well.
         _desktopComponentPlacements.Remove(placement);
 
         ClearDesktopComponentSelection();
 
         ApplyTaskbarActionVisibility(GetCurrentTaskbarContext());
 
-        // 娣囨繂鐡ㄧ拋鍓х枂
         PersistSettings();
     }
 
+    private static void DisposeComponentIfNeeded(Border host)
+    {
+        if (TryGetContentHost(host) is Border contentHost && contentHost.Child is Control componentControl)
+        {
+            if (componentControl is IDisposable disposableComponent)
+            {
+                disposableComponent.Dispose();
+            }
+        }
+    }
+
     private void OpenComponentSettings()
     {
         if (_selectedDesktopComponentHost is null || _selectedDesktopComponentHost.Tag is not string placementId)
@@ -1389,6 +1399,10 @@ public partial class MainWindow
         if (_desktopPageComponentGrids.TryGetValue(_currentDesktopSurfaceIndex, out var pageGrid))
         {
             ClearTimeZoneServiceBindings(pageGrid.Children.OfType<Control>().ToList());
+            foreach (var child in pageGrid.Children.OfType<Border>())
+            {
+                DisposeComponentIfNeeded(child);
+            }
         }
         
         foreach (var placement in placementsToRemove)