diff --git a/src/ZB.MOM.WW.ScadaBridge.ConfigurationDatabase/Repositories/DeploymentManagerRepository.cs b/src/ZB.MOM.WW.ScadaBridge.ConfigurationDatabase/Repositories/DeploymentManagerRepository.cs
index b50fc5c2..add1faad 100644
--- a/src/ZB.MOM.WW.ScadaBridge.ConfigurationDatabase/Repositories/DeploymentManagerRepository.cs
+++ b/src/ZB.MOM.WW.ScadaBridge.ConfigurationDatabase/Repositories/DeploymentManagerRepository.cs
@@ -198,6 +198,7 @@ public class DeploymentManagerRepository : IDeploymentManagerRepository
             .Include(i => i.AttributeOverrides)
             .Include(i => i.AlarmOverrides)
             .Include(i => i.ConnectionBindings)
+            .Include(i => i.NativeAlarmSourceOverrides)
             .AsSplitQuery()
             .FirstOrDefaultAsync(i => i.Id == instanceId, cancellationToken);
     }
@@ -209,6 +210,7 @@ public class DeploymentManagerRepository : IDeploymentManagerRepository
             .Include(i => i.AttributeOverrides)
             .Include(i => i.AlarmOverrides)
             .Include(i => i.ConnectionBindings)
+            .Include(i => i.NativeAlarmSourceOverrides)
             .AsSplitQuery()
             .FirstOrDefaultAsync(i => i.UniqueName == uniqueName, cancellationToken);
     }
diff --git a/tests/ZB.MOM.WW.ScadaBridge.ConfigurationDatabase.Tests/RepositoryCoverageTests.cs b/tests/ZB.MOM.WW.ScadaBridge.ConfigurationDatabase.Tests/RepositoryCoverageTests.cs
index c659afaa..c532b71f 100644
--- a/tests/ZB.MOM.WW.ScadaBridge.ConfigurationDatabase.Tests/RepositoryCoverageTests.cs
+++ b/tests/ZB.MOM.WW.ScadaBridge.ConfigurationDatabase.Tests/RepositoryCoverageTests.cs
@@ -972,6 +972,40 @@ public class DeploymentManagerRepositoryTests : IDisposable
         Assert.Empty(await _repository.GetDeploymentsByInstanceIdAsync(instance.Id));
     }
 
+    [Fact]
+    public async Task GetInstanceByIdAsync_IncludesNativeAlarmSourceOverrides()
+    {
+        // Regression for #226: NativeAlarmSourceOverrides was omitted from the Include chain.
+        var instance = await SeedInstanceAsync();
+        instance.NativeAlarmSourceOverrides.Add(
+            new InstanceNativeAlarmSourceOverride("src/AlarmA") { InstanceId = instance.Id });
+        await _context.SaveChangesAsync();
+        _context.ChangeTracker.Clear();
+
+        var loaded = await _repository.GetInstanceByIdAsync(instance.Id);
+
+        Assert.NotNull(loaded);
+        Assert.Single(loaded!.NativeAlarmSourceOverrides);
+        Assert.Equal("src/AlarmA", loaded.NativeAlarmSourceOverrides.First().SourceCanonicalName);
+    }
+
+    [Fact]
+    public async Task GetInstanceByUniqueNameAsync_IncludesNativeAlarmSourceOverrides()
+    {
+        // Regression for #226: NativeAlarmSourceOverrides was omitted from the Include chain.
+        var instance = await SeedInstanceAsync();
+        instance.NativeAlarmSourceOverrides.Add(
+            new InstanceNativeAlarmSourceOverride("src/AlarmB") { InstanceId = instance.Id });
+        await _context.SaveChangesAsync();
+        _context.ChangeTracker.Clear();
+
+        var loaded = await _repository.GetInstanceByUniqueNameAsync(instance.UniqueName);
+
+        Assert.NotNull(loaded);
+        Assert.Single(loaded!.NativeAlarmSourceOverrides);
+        Assert.Equal("src/AlarmB", loaded.NativeAlarmSourceOverrides.First().SourceCanonicalName);
+    }
+
     [Fact]
     public void Constructor_NullContext_Throws()
     {