diff --git a/src/Avalonia.Base/Animation/Animation.cs b/src/Avalonia.Base/Animation/Animation.cs
index d62acc0d52..dd99c40cd3 100644
--- a/src/Avalonia.Base/Animation/Animation.cs
+++ b/src/Avalonia.Base/Animation/Animation.cs
@@ -200,7 +200,7 @@ namespace Avalonia.Animation
         /// </summary>
         /// <param name="setter">The animation setter.</param>
         /// <param name="value">The property animator value.</param>
-        public static void SetAnimator(IAnimationSetter setter, 
+        public static void SetAnimator(IAnimationSetter setter,
             [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicParameterlessConstructor | DynamicallyAccessedMemberTypes.PublicMethods)]
             Type value)
         {
@@ -319,7 +319,7 @@ namespace Avalonia.Animation
             if (animators.Count == 1)
             {
                 var subscription = animators[0].Apply(this, control, clock, match, onComplete);
-                
+
                 if (subscription is not null)
                 {
                     subscriptions.Add(subscription);
@@ -348,9 +348,11 @@ namespace Avalonia.Animation
 
                 if (onComplete != null)
                 {
-                    Task.WhenAll(completionTasks!).ContinueWith(
-                        (_, state) => ((Action)state!).Invoke(),
-                        onComplete);
+                    Task.WhenAll(completionTasks!)
+                        .ContinueWith((_, state) => ((Action)state!).Invoke()
+                            , onComplete
+                            , TaskScheduler.FromCurrentSynchronizationContext()
+                            );
                 }
             }
             return new CompositeDisposable(subscriptions);
diff --git a/src/Avalonia.Base/Layout/LayoutManager.cs b/src/Avalonia.Base/Layout/LayoutManager.cs
index 747ee1c082..f47738f2e4 100644
--- a/src/Avalonia.Base/Layout/LayoutManager.cs
+++ b/src/Avalonia.Base/Layout/LayoutManager.cs
@@ -249,10 +249,12 @@ namespace Avalonia.Layout
             {
                 var control = _toMeasure.Dequeue();
 
-                if (!control.IsMeasureValid && control.IsAttachedToVisualTree)
+                if (!control.IsMeasureValid)
                 {
                     Measure(control);
                 }
+
+                _toArrange.Enqueue(control);
             }
         }
 
@@ -262,7 +264,7 @@ namespace Avalonia.Layout
             {
                 var control = _toArrange.Dequeue();
 
-                if (!control.IsArrangeValid && control.IsAttachedToVisualTree)
+                if (!control.IsArrangeValid)
                 {
                     Arrange(control);
                 }
@@ -297,8 +299,6 @@ namespace Avalonia.Layout
                 {
                     control.Measure(control.PreviousMeasure.Value);
                 }
-
-                _toArrange.Enqueue(control);
             }
 
             return true;
diff --git a/src/Avalonia.Controls/Presenters/ContentPresenter.cs b/src/Avalonia.Controls/Presenters/ContentPresenter.cs
index 329a0fa6ab..736c338c10 100644
--- a/src/Avalonia.Controls/Presenters/ContentPresenter.cs
+++ b/src/Avalonia.Controls/Presenters/ContentPresenter.cs
@@ -1,5 +1,5 @@
 using System;
-
+using Avalonia.Collections;
 using Avalonia.Controls.Documents;
 using Avalonia.Controls.Metadata;
 using Avalonia.Controls.Primitives;
@@ -442,7 +442,7 @@ namespace Avalonia.Controls.Presenters
             var contentTemplate = ContentTemplate;
             var oldChild = Child;
             var newChild = CreateChild(content, oldChild, contentTemplate);
-            var logicalChildren = Host?.LogicalChildren ?? LogicalChildren;
+            var logicalChildren = GetEffectiveLogicalChildren();
 
             // Remove the old child if we're not recycling it.
             if (newChild != oldChild)
@@ -488,6 +488,9 @@ namespace Avalonia.Controls.Presenters
 
         }
 
+        private IAvaloniaList<ILogical> GetEffectiveLogicalChildren()
+            => Host?.LogicalChildren ?? LogicalChildren;
+
         /// <inheritdoc/>
         protected override void OnAttachedToLogicalTree(LogicalTreeAttachmentEventArgs e)
         {
@@ -692,7 +695,7 @@ namespace Avalonia.Controls.Presenters
             else if (Child != null)
             {
                 VisualChildren.Remove(Child);
-                LogicalChildren.Remove(Child);
+                GetEffectiveLogicalChildren().Remove(Child);
                 ((ISetInheritanceParent)Child).SetParent(Child.Parent);
                 Child = null;
                 _recyclingDataTemplate = null;
diff --git a/tests/Avalonia.Base.UnitTests/Layout/LayoutManagerTests.cs b/tests/Avalonia.Base.UnitTests/Layout/LayoutManagerTests.cs
index 09f78c5a6c..45a6efdd4a 100644
--- a/tests/Avalonia.Base.UnitTests/Layout/LayoutManagerTests.cs
+++ b/tests/Avalonia.Base.UnitTests/Layout/LayoutManagerTests.cs
@@ -514,5 +514,38 @@ namespace Avalonia.Base.UnitTests.Layout
             Assert.True(parent.IsMeasureValid);
             Assert.True(parent.IsArrangeValid);
         }
+
+        [Fact]
+        public void Grandparent_Can_Invalidate_Root_Measure_During_Arrange()
+        {
+            // Issue #11161.
+            var child = new LayoutTestControl();
+            var parent = new LayoutTestControl { Child = child };
+            var grandparent = new LayoutTestControl { Child = parent };
+            var root = new LayoutTestRoot { Child = grandparent };
+
+            root.LayoutManager.ExecuteInitialLayoutPass();
+
+            grandparent.DoArrangeOverride = (_, s) =>
+            {
+                root.InvalidateMeasure();
+                return s;
+            };
+            grandparent.CallBaseArrange = true;
+
+            child.InvalidateMeasure();
+            grandparent.InvalidateMeasure();
+
+            root.LayoutManager.ExecuteLayoutPass();
+
+            Assert.True(child.IsMeasureValid);
+            Assert.True(child.IsArrangeValid);
+            Assert.True(parent.IsMeasureValid);
+            Assert.True(parent.IsArrangeValid);
+            Assert.True(grandparent.IsMeasureValid);
+            Assert.True(grandparent.IsArrangeValid);
+            Assert.True(root.IsMeasureValid);
+            Assert.True(root.IsArrangeValid);
+        }
     }
 }
diff --git a/tests/Avalonia.Base.UnitTests/Layout/LayoutTestControl.cs b/tests/Avalonia.Base.UnitTests/Layout/LayoutTestControl.cs
index 62de81006e..d85c7ed9bc 100644
--- a/tests/Avalonia.Base.UnitTests/Layout/LayoutTestControl.cs
+++ b/tests/Avalonia.Base.UnitTests/Layout/LayoutTestControl.cs
@@ -10,21 +10,41 @@ namespace Avalonia.Base.UnitTests.Layout
         public bool Arranged { get; set; }
         public Func<Layoutable, Size, Size> DoMeasureOverride { get; set; }
         public Func<Layoutable, Size, Size> DoArrangeOverride { get; set; }
+        public bool CallBaseMeasure { get; set; }
+        public bool CallBaseArrange { get; set; }
 
         protected override Size MeasureOverride(Size availableSize)
         {
             Measured = true;
-            return DoMeasureOverride != null ?
-                DoMeasureOverride(this, availableSize) :
-                base.MeasureOverride(availableSize);
+
+            if (DoMeasureOverride is not null)
+            {
+                var overrideResult = DoMeasureOverride(this, availableSize);
+                return CallBaseMeasure ?
+                    base.MeasureOverride(overrideResult) :
+                    overrideResult;
+            }
+            else
+            {
+                return base.MeasureOverride(availableSize);
+            }
         }
 
         protected override Size ArrangeOverride(Size finalSize)
         {
             Arranged = true;
-            return DoArrangeOverride != null ?
-                DoArrangeOverride(this, finalSize) :
-                base.ArrangeOverride(finalSize);
+
+            if (DoArrangeOverride is not null)
+            {
+                var overrideResult = DoArrangeOverride(this, finalSize);
+                return CallBaseArrange ?
+                    base.ArrangeOverride(overrideResult) :
+                    overrideResult;
+            }
+            else
+            {
+                return base.ArrangeOverride(finalSize);
+            }
         }
     }
 }
diff --git a/tests/Avalonia.Controls.UnitTests/ContentControlTests.cs b/tests/Avalonia.Controls.UnitTests/ContentControlTests.cs
index bece711426..d5e4693666 100644
--- a/tests/Avalonia.Controls.UnitTests/ContentControlTests.cs
+++ b/tests/Avalonia.Controls.UnitTests/ContentControlTests.cs
@@ -359,16 +359,21 @@ namespace Avalonia.Controls.UnitTests
             target.Presenter.ApplyTemplate();
 
             Assert.Equal(target, target.Presenter.Child.GetLogicalParent());
+            Assert.Equal(new[] { target.Presenter.Child }, target.LogicalChildren);
 
             root.Child = null;
 
             Assert.Null(target.Template);
 
             target.Content = null;
+
+            Assert.Empty(target.LogicalChildren);
+
             root.Child = target;
             target.Content = "Bar";
 
             Assert.Equal(target, target.Presenter.Child.GetLogicalParent());
+            Assert.Equal(new[] { target.Presenter.Child }, target.LogicalChildren);
         }
 
         private static FuncControlTemplate GetTemplate()