diff --git a/ui/views/widget/desktop_aura/desktop_window_tree_host_platform_unittest.cc b/ui/views/widget/desktop_aura/desktop_window_tree_host_platform_unittest.cc
index 5bdaf3387fbb1..b45411b37af35 100644
--- a/ui/views/widget/desktop_aura/desktop_window_tree_host_platform_unittest.cc
+++ b/ui/views/widget/desktop_aura/desktop_window_tree_host_platform_unittest.cc
@@ -752,6 +752,14 @@ class MaximizeBoundsChangeStubWindow : public ui::StubWindow {
   void Maximize() override {
     delegate()->OnBoundsChanged({/*origin_changed=*/true});
   }
+
+  // Mirrors X11Window::Restore() when the window is fullscreen: it calls
+  // SetFullscreen(false) whose final action is
+  // platform_window_delegate_->OnBoundsChanged(), explicitly documented as
+  // potentially deleting `this` (ui/ozone/platform/x11/x11_window.cc).
+  void Restore() override {
+    delegate()->OnBoundsChanged({/*origin_changed=*/true});
+  }
 };
 
 class MaximizeBoundsChangePlatformWindowFactoryDelegate
@@ -797,6 +805,33 @@ TEST_F(DesktopWindowTreeHostPlatformTest,
   // This should not crash or trigger UAF.
   host_platform->Maximize();
 }
+
+// Regression test: DesktopWindowTreeHostPlatform::Restore() must survive the
+// platform window synchronously deleting the host during the OnBoundsChanged
+// observer fan-out. On X11, X11Window::Restore() from a fullscreen window calls
+// SetFullscreen(false) which dispatches OnBoundsChanged() and is documented as
+// potentially deleting `this`. Without a weak-pointer guard, the trailing call
+// to Show() in Restore() runs on a freed object.
+TEST_F(DesktopWindowTreeHostPlatformTest,
+       RestoreSurvivesSynchronousCloseDuringBoundsChange) {
+  auto scoped_platform_window_factory_delegate =
+      std::make_unique<MaximizeBoundsChangePlatformWindowFactoryDelegate>();
+
+  std::unique_ptr<Widget> widget = CreateWidgetWithNativeWidget();
+  widget->Show();
+
+  auto* host_platform = DesktopWindowTreeHostPlatform::GetHostForWidget(
+      widget->GetNativeWindow()->GetHost()->GetAcceleratedWidget());
+  ASSERT_TRUE(host_platform);
+
+  CloseOnBoundsChangedWidgetObserver observer(widget.get());
+
+  // This should not crash or trigger UAF, but currently does:
+  // platform_window()->Restore() -> OnBoundsChanged -> observer CloseNow()
+  // frees |host_platform|, then Restore() unconditionally calls Show() on the
+  // freed |this|.
+  host_platform->Restore();
+}
 #endif  // !BUILDFLAG(IS_FUCHSIA)
 
 }  // namespace views