diff --git a/third_party/blink/renderer/core/dom/node.cc b/third_party/blink/renderer/core/dom/node.cc
index 6936978b34ca0..d48bfc50dce21 100644
--- a/third_party/blink/renderer/core/dom/node.cc
+++ b/third_party/blink/renderer/core/dom/node.cc
@@ -57,6 +57,7 @@
 #include "third_party/blink/renderer/core/dom/events/event_dispatcher.h"
 #include "third_party/blink/renderer/core/dom/events/event_listener.h"
 #include "third_party/blink/renderer/core/dom/events/event_path.h"
+#include "third_party/blink/renderer/core/dom/events/scoped_event_queue.h"
 #include "third_party/blink/renderer/core/dom/flat_tree_node_data.h"
 #include "third_party/blink/renderer/core/dom/flat_tree_traversal.h"
 #include "third_party/blink/renderer/core/dom/focus_params.h"
@@ -775,8 +776,13 @@ void Node::moveBefore(Node* new_child,
 
   ContainerNode* old_parent = new_child->parentNode();
 
-  insertBefore(new_child, ref_child, exception_state);
-  GetDocument().SetStatePreservingAtomicMoveInProgress(false);
+  {
+    // Defer any scoped events that `ChildrenChanged()` overrides may dispatch
+    // until after the atomic move completes.
+    EventQueueScope event_queue_scope;
+    insertBefore(new_child, ref_child, exception_state);
+    GetDocument().SetStatePreservingAtomicMoveInProgress(false);
+  }
 
   if (exception_state.HadException()) {
     return;
diff --git a/third_party/blink/renderer/core/html/forms/html_input_element_test.cc b/third_party/blink/renderer/core/html/forms/html_input_element_test.cc
index c51cd2ea70b5e..d585b9b24e62a 100644
--- a/third_party/blink/renderer/core/html/forms/html_input_element_test.cc
+++ b/third_party/blink/renderer/core/html/forms/html_input_element_test.cc
@@ -12,6 +12,7 @@
 #include "third_party/blink/renderer/bindings/core/v8/v8_keyboard_event_init.h"
 #include "third_party/blink/renderer/bindings/core/v8/v8_wheel_event_init.h"
 #include "third_party/blink/renderer/core/dom/document.h"
+#include "third_party/blink/renderer/core/dom/events/native_event_listener.h"
 #include "third_party/blink/renderer/core/dom/shadow_root.h"
 #include "third_party/blink/renderer/core/events/keyboard_event.h"
 #include "third_party/blink/renderer/core/events/wheel_event.h"
@@ -24,6 +25,7 @@
 #include "third_party/blink/renderer/core/html/forms/file_input_type.h"
 #include "third_party/blink/renderer/core/html/forms/html_form_element.h"
 #include "third_party/blink/renderer/core/html/forms/html_option_element.h"
+#include "third_party/blink/renderer/core/html/forms/slider_thumb_element.h"
 #include "third_party/blink/renderer/core/html/forms/spin_button_element.h"
 #include "third_party/blink/renderer/core/html/html_body_element.h"
 #include "third_party/blink/renderer/core/html/html_html_element.h"
@@ -50,6 +52,22 @@ class PasswordResetChromeClient : public EmptyChromeClient {
               (override));
 };
 
+class AtomicMoveCaptureListener final : public NativeEventListener {
+ public:
+  void Invoke(ExecutionContext*, Event* event) override {
+    invoked_ = true;
+    Node* node = event->target()->ToNode();
+    in_atomic_move_ =
+        node && node->GetDocument().StatePreservingAtomicMoveInProgress();
+  }
+  bool Invoked() const { return invoked_; }
+  bool InAtomicMove() const { return in_atomic_move_; }
+
+ private:
+  bool invoked_ = false;
+  bool in_atomic_move_ = false;
+};
+
 class HTMLInputElementTestChromeClient : public EmptyChromeClient {
  public:
   gfx::Rect LocalRootToScreenDIPs(const gfx::Rect& local_root_rect,
@@ -230,6 +248,42 @@ TEST_F(HTMLInputElementTest, NoAssertWhenMovedInNewDocument) {
   document.body()->RemoveChild(document.body()->firstChild());
 }
 
+TEST_F(HTMLInputElementTest, RangeChangeEventDeferredDuringMoveBefore) {
+  GetDocument().body()->SetInnerHTMLWithoutTrustedTypes(R"HTML(
+    <fieldset id="fs" disabled>
+      <legend id="l1"><input type="range" id="test"></legend>
+    </fieldset>
+    <legend id="l0"></legend>
+  )HTML");
+  UpdateAllLifecyclePhasesForTest();
+
+  Element* fieldset = GetDocument().getElementById(AtomicString("fs"));
+  Element* l0 = GetDocument().getElementById(AtomicString("l0"));
+  Element* l1 = GetDocument().getElementById(AtomicString("l1"));
+  HTMLInputElement& slider = TestElement();
+
+  // The slider is inside the first <legend>, so it is enabled.
+  ASSERT_FALSE(slider.IsDisabledFormControl());
+
+  auto* thumb =
+      To<SliderThumbElement>(slider.UserAgentShadowRoot()->getElementById(
+          shadow_element_names::kIdSliderThumb));
+  thumb->DragFrom(PhysicalOffset());
+
+  auto* listener = MakeGarbageCollected<AtomicMoveCaptureListener>();
+  slider.addEventListener(event_type_names::kChange, listener);
+
+  // Inserting another <legend> first means the slider's <legend> is no longer
+  // the first child of the disabled <fieldset>, so the slider becomes disabled
+  // and dragging is stopped.
+  fieldset->moveBefore(l0, l1, ASSERT_NO_EXCEPTION);
+
+  EXPECT_TRUE(slider.IsDisabledFormControl());
+  EXPECT_TRUE(listener->Invoked());
+  // The 'change' event must be dispatched after the atomic move completes.
+  EXPECT_FALSE(listener->InAtomicMove());
+}
+
 TEST_F(HTMLInputElementTest, DefaultToolTip) {
   auto* input_without_form =
       MakeGarbageCollected<HTMLInputElement>(GetDocument());