diff --git a/third_party/blink/renderer/core/frame/local_frame_view.cc b/third_party/blink/renderer/core/frame/local_frame_view.cc
index 082ad86152824..6eca27dc91fcb 100644
--- a/third_party/blink/renderer/core/frame/local_frame_view.cc
+++ b/third_party/blink/renderer/core/frame/local_frame_view.cc
@@ -2357,6 +2357,12 @@ bool LocalFrameView::UpdateLifecyclePhases(
   // Run the lifecycle updates.
   UpdateLifecyclePhasesInternal(target_state, reason);
 
+  // The local root may have been synchronously detached via a nested message
+  // loop spun from ResizeObserver script during the lifecycle update.
+  if (!GetFrame().GetPage()) {
+    return false;
+  }
+
   if (target_state == DocumentLifecycle::kPaintClean) {
     TRACE_EVENT0("blink", "LocalFrameView::DidFinishLifecycleUpdate");
 
@@ -2447,6 +2453,12 @@ void LocalFrameView::UpdateLifecyclePhasesInternal(
             DocumentLifecycle::kVisualUpdatePending);
       }
     }
+    // RunResizeObserverSteps (below) runs script which can spin a nested
+    // message loop (e.g. via window.print()) and synchronously detach the
+    // local root frame. Bail out before touching frame state in that case.
+    if (!GetFrame().GetPage()) {
+      return;
+    }
     bool run_more_lifecycle_phases =
         RunStyleAndLayoutLifecyclePhases(target_state);
     if (!run_more_lifecycle_phases) {
diff --git a/third_party/blink/renderer/core/frame/web_frame_widget_impl.cc b/third_party/blink/renderer/core/frame/web_frame_widget_impl.cc
index 1395aa71a377c..e8831437f2acf 100644
--- a/third_party/blink/renderer/core/frame/web_frame_widget_impl.cc
+++ b/third_party/blink/renderer/core/frame/web_frame_widget_impl.cc
@@ -1777,6 +1777,11 @@ void WebFrameWidgetImpl::UpdateLifecycle(WebLifecycleUpdate requested_update,
 
   GetPage()->UpdateLifecycle(*LocalRootImpl()->GetFrame(), requested_update,
                              reason);
+  // The local root may have been synchronously detached via a nested message
+  // loop spun from ResizeObserver script during the lifecycle update.
+  if (!LocalRootImpl()) {
+    return;
+  }
   if (requested_update != WebLifecycleUpdate::kAll)
     return;
 
diff --git a/third_party/blink/renderer/platform/widget/widget_base.cc b/third_party/blink/renderer/platform/widget/widget_base.cc
index 70a4733201db9..1312c188046ca 100644
--- a/third_party/blink/renderer/platform/widget/widget_base.cc
+++ b/third_party/blink/renderer/platform/widget/widget_base.cc
@@ -1145,7 +1145,13 @@ void WidgetBase::UpdateVisualState() {
       ShouldRecordBeginMainFrameMetrics()
           ? DocumentUpdateReason::kBeginMainFrame
           : DocumentUpdateReason::kTest;
+  auto weak_this = weak_ptr_factory_.GetWeakPtr();
   client_->UpdateLifecycle(WebLifecycleUpdate::kAll, lifecycle_reason);
+  // UpdateLifecycle runs ResizeObserver script which can spin a nested message
+  // loop (e.g. via window.print()) and synchronously destroy this WidgetBase.
+  if (!weak_this) {
+    return;
+  }
   client_->SetSuppressFrameRequestsWorkaroundFor704763Only(false);
 }