diff --git a/src/modules/cmdpal/Microsoft.CmdPal.Common/Helpers/InterlockedBoolean.cs b/src/modules/cmdpal/Microsoft.CmdPal.Common/Helpers/InterlockedBoolean.cs
new file mode 100644
index 0000000000..8113ef9990
--- /dev/null
+++ b/src/modules/cmdpal/Microsoft.CmdPal.Common/Helpers/InterlockedBoolean.cs
@@ -0,0 +1,46 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System.Threading;
+
+namespace Microsoft.CmdPal.Common.Helpers;
+
+/// <summary>
+/// Thread-safe boolean implementation using atomic operations
+/// </summary>
+public struct InterlockedBoolean(bool initialValue = false)
+{
+    private int _value = initialValue ? 1 : 0;
+
+    /// <summary>
+    /// Gets or sets the boolean value atomically
+    /// </summary>
+    public bool Value
+    {
+        get => Volatile.Read(ref _value) == 1;
+        set => Interlocked.Exchange(ref _value, value ? 1 : 0);
+    }
+
+    /// <summary>
+    /// Atomically sets the value to true
+    /// </summary>
+    /// <returns>True if the value was previously false, false if it was already true</returns>
+    public bool Set()
+    {
+        return Interlocked.Exchange(ref _value, 1) == 0;
+    }
+
+    /// <summary>
+    /// Atomically sets the value to false
+    /// </summary>
+    /// <returns>True if the value was previously true, false if it was already false</returns>
+    public bool Clear()
+    {
+        return Interlocked.Exchange(ref _value, 0) == 1;
+    }
+
+    public override int GetHashCode() => Value.GetHashCode();
+
+    public override string ToString() => Value.ToString();
+}
diff --git a/src/modules/cmdpal/Microsoft.CmdPal.Core.ViewModels/ListViewModel.cs b/src/modules/cmdpal/Microsoft.CmdPal.Core.ViewModels/ListViewModel.cs
index 57ae504dff..8d54dd141f 100644
--- a/src/modules/cmdpal/Microsoft.CmdPal.Core.ViewModels/ListViewModel.cs
+++ b/src/modules/cmdpal/Microsoft.CmdPal.Core.ViewModels/ListViewModel.cs
@@ -6,6 +6,7 @@ using System.Collections.ObjectModel;
 using CommunityToolkit.Mvvm.ComponentModel;
 using CommunityToolkit.Mvvm.Input;
 using CommunityToolkit.Mvvm.Messaging;
+using Microsoft.CmdPal.Common.Helpers;
 using Microsoft.CmdPal.Core.ViewModels.Messages;
 using Microsoft.CmdPal.Core.ViewModels.Models;
 using Microsoft.CommandPalette.Extensions;
@@ -31,7 +32,7 @@ public partial class ListViewModel : PageViewModel, IDisposable
 
     private readonly Lock _listLock = new();
 
-    private bool _isLoading;
+    private InterlockedBoolean _isLoading;
     private bool _isFetching;
 
     public event TypedEventHandler<ListViewModel, object>? ItemsUpdated;
@@ -121,7 +122,7 @@ public partial class ListViewModel : PageViewModel, IDisposable
 
             ItemsUpdated?.Invoke(this, EventArgs.Empty);
             UpdateEmptyContent();
-            _isLoading = false;
+            _isLoading.Clear();
         }
     }
 
@@ -221,7 +222,7 @@ public partial class ListViewModel : PageViewModel, IDisposable
                 }
 
                 ItemsUpdated?.Invoke(this, EventArgs.Empty);
-                _isLoading = false;
+                _isLoading.Clear();
             });
     }
 
@@ -469,21 +470,38 @@ public partial class ListViewModel : PageViewModel, IDisposable
             return;
         }
 
-        if (model.HasMoreItems && !_isLoading)
+        if (!_isLoading.Set())
         {
-            _isLoading = true;
-            _ = Task.Run(() =>
+            return;
+
+            // NOTE: May miss newly available items until next scroll if model
+            // state changes between our check and this reset
+        }
+
+        _ = Task.Run(() =>
+        {
+            // Execute all COM calls on background thread to avoid reentrancy issues with UI
+            // with the UI thread when COM starts inner message pump
+            try
             {
-                try
+                if (model.HasMoreItems)
                 {
                     model.LoadMore();
+
+                    // _isLoading flag will be set as a result of LoadMore,
+                    // which must raise ItemsChanged to end the loading.
                 }
-                catch (Exception ex)
+                else
                 {
-                    ShowException(ex, model.Name);
+                    _isLoading.Clear();
                 }
-            });
-        }
+            }
+            catch (Exception ex)
+            {
+                _isLoading.Clear();
+                ShowException(ex, model.Name);
+            }
+        });
     }
 
     protected override void FetchProperty(string propertyName)