diff --git a/src/modules/Elsa.Workflows.Core/Contexts/ActivityExecutionContext.cs b/src/modules/Elsa.Workflows.Core/Contexts/ActivityExecutionContext.cs
index 667faa22a..4865d4abd 100644
--- a/src/modules/Elsa.Workflows.Core/Contexts/ActivityExecutionContext.cs
+++ b/src/modules/Elsa.Workflows.Core/Contexts/ActivityExecutionContext.cs
@@ -44,7 +44,7 @@ public partial class ActivityExecutionContext : IExecutionContext, IDisposable
         ActivityState = new ChangeTrackingDictionary<string, object>(Taint);
         ActivityInput = new ChangeTrackingDictionary<string, object>(Taint);
         WorkflowExecutionContext = workflowExecutionContext;
-        _parentActivityExecutionContext = parentActivityExecutionContext;
+        ParentActivityExecutionContext = parentActivityExecutionContext;
         var expressionExecutionContextProps = ExpressionExecutionContextExtensions.CreateActivityExecutionContextPropertiesFrom(workflowExecutionContext, workflowExecutionContext.Input);
         expressionExecutionContextProps[ExpressionExecutionContextExtensions.ActivityKey] = activity;
         ExpressionExecutionContext = new(workflowExecutionContext.ServiceProvider, new(), parentActivityExecutionContext?.ExpressionExecutionContext ?? workflowExecutionContext.ExpressionExecutionContext, expressionExecutionContextProps, Taint, CancellationToken);
diff --git a/src/modules/Elsa.Workflows.Core/Extensions/ActivityExecutionContextExtensions.cs b/src/modules/Elsa.Workflows.Core/Extensions/ActivityExecutionContextExtensions.cs
index 59a69c68d..91740adde 100644
--- a/src/modules/Elsa.Workflows.Core/Extensions/ActivityExecutionContextExtensions.cs
+++ b/src/modules/Elsa.Workflows.Core/Extensions/ActivityExecutionContextExtensions.cs
@@ -254,7 +254,7 @@ public static partial class ActivityExecutionContextExtensions
             return;
 
         // Select all child contexts.
-        var childContexts = context.WorkflowExecutionContext.ActivityExecutionContexts.Where(x => x.ParentActivityExecutionContext == context).ToList();
+        var childContexts = context.Children.ToList();
 
         foreach (var childContext in childContexts)
             await CancelActivityAsync(childContext);
@@ -320,7 +320,7 @@ public static partial class ActivityExecutionContextExtensions
     /// </summary>
     public static IEnumerable<ActivityExecutionContext> GetDescendents(this ActivityExecutionContext context)
     {
-        var children = context.WorkflowExecutionContext.ActivityExecutionContexts.Where(x => x.ParentActivityExecutionContext == context).ToList();
+        var children = context.Children.ToList();
 
         foreach (var child in children)
         {
@@ -336,7 +336,7 @@ public static partial class ActivityExecutionContextExtensions
     /// </summary>
     public static IEnumerable<ActivityExecutionContext> GetActiveChildren(this ActivityExecutionContext context)
     {
-        return context.WorkflowExecutionContext.ActivityExecutionContexts.Where(x => x.ParentActivityExecutionContext == context);
+        return context.Children;
     }
 
     /// <summary>
@@ -344,7 +344,7 @@ public static partial class ActivityExecutionContextExtensions
     /// </summary>
     public static IEnumerable<ActivityExecutionContext> GetChildren(this ActivityExecutionContext context)
     {
-        return context.WorkflowExecutionContext.ActivityExecutionContexts.Where(x => x.ParentActivityExecutionContext == context);
+        return context.Children;
     }
 
     /// <summary>
@@ -352,7 +352,7 @@ public static partial class ActivityExecutionContextExtensions
     /// </summary>
     public static IEnumerable<ActivityExecutionContext> GetDescendants(this ActivityExecutionContext context)
     {
-        var children = context.WorkflowExecutionContext.ActivityExecutionContexts.Where(x => x.ParentActivityExecutionContext == context).ToList();
+        var children = context.Children.ToList();
 
         foreach (var child in children)
         {