diff --git a/MSIXplainer/MainPage.xaml b/MSIXplainer/MainPage.xaml
index f275cb2..3a0b7a7 100644
--- a/MSIXplainer/MainPage.xaml
+++ b/MSIXplainer/MainPage.xaml
@@ -511,7 +511,7 @@
 
                         <!-- ── FINDING DETAIL PANE (shared, right side) ── -->
                         <Border Grid.Column="1" Width="380"
-                                Visibility="{x:Bind local:MainPage.NullToCollapsed(ViewModel.SelectedFinding), Mode=OneWay}"
+                                Visibility="{x:Bind local:MainPage.BoolToVisibility(ViewModel.IsFindingDetailVisible), Mode=OneWay}"
                                 Background="{ThemeResource LayerFillColorDefaultBrush}"
                                 BorderBrush="{ThemeResource CardStrokeColorDefaultBrush}"
                                 BorderThickness="1,0,0,0">
@@ -519,12 +519,13 @@
                                 <StackPanel Spacing="16">
                                     <!-- Close button -->
                                     <Button AutomationProperties.AutomationId="BtnCloseFinding"
+                                            AutomationProperties.Name="Close finding details"
                                             HorizontalAlignment="Right"
                                             Click="OnCloseFindingClick"
-                                            Padding="4" MinWidth="0" MinHeight="0"
+                                            Padding="8" MinWidth="32" MinHeight="32"
                                             Background="Transparent" BorderThickness="0"
                                             ToolTipService.ToolTip="Close">
-                                        <FontIcon Glyph="&#xE711;" FontSize="12" />
+                                        <FontIcon Glyph="&#xE711;" FontSize="14" />
                                     </Button>
 
                                     <!-- Header -->
diff --git a/MSIXplainer/MainPage.xaml.cs b/MSIXplainer/MainPage.xaml.cs
index 00dfdee..879ae5e 100644
--- a/MSIXplainer/MainPage.xaml.cs
+++ b/MSIXplainer/MainPage.xaml.cs
@@ -200,12 +200,15 @@ private void ViewFinding_Click(object sender, RoutedEventArgs e)
     /// <summary>
     /// Closes the finding detail pane. Clears the OverviewFindingsList selection
     /// explicitly first so the TwoWay binding can't immediately re-push the old
-    /// selection back into ViewModel.SelectedFinding once we null it.
+    /// selection back into ViewModel.SelectedFinding once we null it. Then
+    /// explicitly toggles IsFindingDetailVisible so the pane collapses even if
+    /// the SelectedFinding PropertyChanged notification gets coalesced.
     /// </summary>
     private void OnCloseFindingClick(object sender, RoutedEventArgs e)
     {
         OverviewFindingsList.SelectedItem = null;
         ViewModel.SelectedFinding = null;
+        ViewModel.IsFindingDetailVisible = false;
     }
 
     /// <summary>
diff --git a/MSIXplainer/ViewModels/MainPageViewModel.cs b/MSIXplainer/ViewModels/MainPageViewModel.cs
index f5eb16a..49e30f6 100644
--- a/MSIXplainer/ViewModels/MainPageViewModel.cs
+++ b/MSIXplainer/ViewModels/MainPageViewModel.cs
@@ -25,6 +25,22 @@ public partial class MainPageViewModel : ObservableObject
     [ObservableProperty]
     public partial ManifestFinding? SelectedFinding { get; set; }
 
+    /// <summary>
+    /// Whether the right-side finding-detail pane should be visible. Tracked as a
+    /// distinct observable bool (rather than binding visibility to a
+    /// NullToCollapsed function on SelectedFinding) because the x:Bind function
+    /// re-evaluation was unreliable in combination with the Overview ListView's
+    /// TwoWay SelectedItem binding — the pane would stay open after the close
+    /// button cleared the selection. See issue #15.
+    /// </summary>
+    [ObservableProperty]
+    public partial bool IsFindingDetailVisible { get; set; }
+
+    partial void OnSelectedFindingChanged(ManifestFinding? value)
+    {
+        IsFindingDetailVisible = value is not null;
+    }
+
     [ObservableProperty]
     public partial string AssessmentMessage { get; set; } = string.Empty;