diff --git a/new_editor/src/Core/UIEditorShellInteraction.cpp b/new_editor/src/Core/UIEditorShellInteraction.cpp
index eed82475..e2dbc3cd 100644
--- a/new_editor/src/Core/UIEditorShellInteraction.cpp
+++ b/new_editor/src/Core/UIEditorShellInteraction.cpp
@@ -137,7 +137,10 @@ const std::vector<UIEditorResolvedMenuItem>* ResolvePopupItems(
 
     const UIEditorResolvedMenuItem* item =
         FindResolvedMenuItemRecursive(menu->items, popupState.itemId);
-    if (item == nullptr || item->kind != UIEditorMenuItemKind::Submenu) {
+    if (item == nullptr ||
+        item->kind != UIEditorMenuItemKind::Submenu ||
+        !item->enabled ||
+        item->children.empty()) {
         return nullptr;
     }
 
diff --git a/tests/UI/Editor/unit/test_ui_editor_shell_interaction.cpp b/tests/UI/Editor/unit/test_ui_editor_shell_interaction.cpp
index 8c146c7d..fef3285a 100644
--- a/tests/UI/Editor/unit/test_ui_editor_shell_interaction.cpp
+++ b/tests/UI/Editor/unit/test_ui_editor_shell_interaction.cpp
@@ -18,6 +18,7 @@ using XCEngine::UI::Editor::BuildDefaultUIEditorWorkspaceController;
 using XCEngine::UI::Editor::BuildUIEditorWorkspacePanel;
 using XCEngine::UI::Editor::BuildUIEditorWorkspaceSplit;
 using XCEngine::UI::Editor::BuildUIEditorWorkspaceTabStack;
+using XCEngine::UI::Editor::FindUIEditorWorkspacePanelPresentationState;
 using XCEngine::UI::Editor::ResolveUIEditorShellInteractionRequest;
 using XCEngine::UI::Editor::UIEditorCommandDispatchStatus;
 using XCEngine::UI::Editor::UIEditorCommandDispatcher;
@@ -479,6 +480,69 @@ TEST(UIEditorShellInteractionTest, DisabledSubmenuDoesNotOpenChildPopup) {
     EXPECT_TRUE(state.menuSession.HasOpenMenu());
 }
 
+TEST(UIEditorShellInteractionTest, HoverDisabledSubmenuSiblingClosesOnlyOpenChildChain) {
+    auto controller = BuildController();
+    auto model = BuildInteractionModel();
+    UIEditorResolvedMenuItem disabledSibling = {};
+    disabledSibling.kind = UIEditorMenuItemKind::Submenu;
+    disabledSibling.itemId = "file-disabled-tools";
+    disabledSibling.label = "Disabled Tools";
+    disabledSibling.enabled = false;
+    disabledSibling.children = {
+        UIEditorResolvedMenuItem{
+            UIEditorMenuItemKind::Command,
+            "file-disabled-child",
+            "Disabled Child",
+            "workspace.close",
+            "Disabled Child",
+            {},
+            true,
+            false
+        }
+    };
+    model.resolvedMenuModel.menus[0].items.push_back(disabledSibling);
+
+    UIEditorShellInteractionState state = {};
+    auto frame = UpdateUIEditorShellInteraction(
+        state,
+        controller,
+        UIRect(0.0f, 0.0f, 1280.0f, 720.0f),
+        model,
+        { MakeLeftPointerDown(UIPoint(40.0f, 30.0f)) });
+    const auto* submenuItem = FindPopupItem(frame, "file-workspace-tools");
+    const auto* disabledSiblingItem = FindPopupItem(frame, "file-disabled-tools");
+    ASSERT_NE(submenuItem, nullptr);
+    ASSERT_NE(disabledSiblingItem, nullptr);
+    const UIRect submenuRect = submenuItem->rect;
+
+    frame = UpdateUIEditorShellInteraction(
+        state,
+        controller,
+        UIRect(0.0f, 0.0f, 1280.0f, 720.0f),
+        model,
+        { MakePointerMove(RectCenter(submenuRect)) });
+    ASSERT_EQ(frame.request.popupRequests.size(), 2u);
+    const std::string childPopupId = frame.request.popupRequests[1].popupId;
+    disabledSiblingItem = FindPopupItem(frame, "file-disabled-tools");
+    ASSERT_NE(disabledSiblingItem, nullptr);
+    const UIRect disabledSiblingRect = disabledSiblingItem->rect;
+
+    frame = UpdateUIEditorShellInteraction(
+        state,
+        controller,
+        UIRect(0.0f, 0.0f, 1280.0f, 720.0f),
+        model,
+        { MakePointerMove(RectCenter(disabledSiblingRect)) });
+
+    EXPECT_TRUE(frame.result.menuMutation.changed);
+    ASSERT_EQ(frame.result.menuMutation.closedPopupIds.size(), 1u);
+    EXPECT_EQ(frame.result.menuMutation.closedPopupIds.front(), childPopupId);
+    EXPECT_EQ(frame.openRootMenuId, "file");
+    ASSERT_EQ(frame.request.popupRequests.size(), 1u);
+    EXPECT_EQ(frame.request.popupRequests.front().menuId, "file");
+    EXPECT_TRUE(state.menuSession.HasOpenMenu());
+}
+
 TEST(UIEditorShellInteractionTest, FocusLostDismissesWholeMenuChain) {
     auto controller = BuildController();
     const auto model = BuildInteractionModel();
@@ -515,6 +579,77 @@ TEST(UIEditorShellInteractionTest, FocusLostDismissesWholeMenuChain) {
     EXPECT_TRUE(frame.request.popupRequests.empty());
 }
 
+TEST(UIEditorShellInteractionTest, FocusLostWhileMenuOpenReleasesExistingViewportCapture) {
+    auto controller = BuildController();
+    const auto model = BuildInteractionModel();
+
+    UIEditorShellInteractionState state = {};
+    auto frame = UpdateUIEditorShellInteraction(
+        state,
+        controller,
+        UIRect(0.0f, 0.0f, 1280.0f, 720.0f),
+        model,
+        {});
+    const auto* fileButton = FindMenuButton(frame, "file");
+    ASSERT_NE(fileButton, nullptr);
+    const UIRect fileButtonRect = fileButton->rect;
+    ASSERT_FALSE(frame.shellFrame.workspaceFrame.viewportFrames.empty());
+
+    const UIRect inputRect =
+        frame.shellFrame.workspaceFrame.viewportFrames.front().viewportShellFrame.slotLayout.inputRect;
+    const UIPoint center = RectCenter(inputRect);
+    frame = UpdateUIEditorShellInteraction(
+        state,
+        controller,
+        UIRect(0.0f, 0.0f, 1280.0f, 720.0f),
+        model,
+        {
+            MakePointerMove(center),
+            MakeLeftPointerDown(center)
+        });
+    ASSERT_TRUE(frame.result.requestPointerCapture);
+    const auto* sceneStateBeforeMenu = FindUIEditorWorkspacePanelPresentationState(
+        state.workspaceInteractionState.composeState,
+        "scene");
+    ASSERT_NE(sceneStateBeforeMenu, nullptr);
+    ASSERT_TRUE(sceneStateBeforeMenu->viewportShellState.inputBridgeState.captured);
+
+    frame = UpdateUIEditorShellInteraction(
+        state,
+        controller,
+        UIRect(0.0f, 0.0f, 1280.0f, 720.0f),
+        model,
+        { MakeLeftPointerDown(RectCenter(fileButtonRect)) });
+    ASSERT_TRUE(state.menuSession.HasOpenMenu());
+    const auto* sceneStateWithMenu = FindUIEditorWorkspacePanelPresentationState(
+        state.workspaceInteractionState.composeState,
+        "scene");
+    ASSERT_NE(sceneStateWithMenu, nullptr);
+    ASSERT_TRUE(sceneStateWithMenu->viewportShellState.inputBridgeState.captured);
+
+    frame = UpdateUIEditorShellInteraction(
+        state,
+        controller,
+        UIRect(0.0f, 0.0f, 1280.0f, 720.0f),
+        model,
+        { MakeFocusLost() });
+
+    EXPECT_TRUE(frame.result.consumed);
+    EXPECT_TRUE(frame.result.menuMutation.changed);
+    EXPECT_EQ(frame.result.menuMutation.dismissReason, UIPopupDismissReason::FocusLoss);
+    EXPECT_TRUE(frame.result.releasePointerCapture);
+    EXPECT_TRUE(frame.result.workspaceResult.releasePointerCapture);
+    EXPECT_EQ(frame.result.viewportPanelId, "scene");
+    EXPECT_TRUE(frame.result.viewportInputFrame.focusLost);
+    EXPECT_TRUE(frame.result.viewportInputFrame.captureEnded);
+    EXPECT_FALSE(state.menuSession.HasOpenMenu());
+    const auto* sceneStateAfterFocusLoss = FindUIEditorWorkspacePanelPresentationState(
+        state.workspaceInteractionState.composeState,
+        "scene");
+    ASSERT_NE(sceneStateAfterFocusLoss, nullptr);
+    EXPECT_FALSE(sceneStateAfterFocusLoss->viewportShellState.inputBridgeState.captured);
+}
+
 TEST(UIEditorShellInteractionTest, OpenMenuConsumesWorkspacePointerDownForThatFrame) {
     auto controller = BuildController();
     const auto model = BuildInteractionModel();
@@ -648,3 +783,77 @@ TEST(UIEditorShellInteractionTest, InvalidResolvedMenuStateClosesInvisibleModalC
     EXPECT_FALSE(state.menuSession.HasOpenMenu());
     EXPECT_TRUE(frame.request.popupRequests.empty());
 }
+
+TEST(UIEditorShellInteractionTest, OpenedSubmenuClosesWhenSourceItemBecomesDisabled) {
+    auto controller = BuildController();
+    auto model = BuildInteractionModel();
+
+    UIEditorShellInteractionState state = {};
+    auto frame = UpdateUIEditorShellInteraction(
+        state,
+        controller,
+        UIRect(0.0f, 0.0f, 1280.0f, 720.0f),
+        model,
+        { MakeLeftPointerDown(UIPoint(40.0f, 30.0f)) });
+    const auto* submenuItem = FindPopupItem(frame, "file-workspace-tools");
+    ASSERT_NE(submenuItem, nullptr);
+
+    frame = UpdateUIEditorShellInteraction(
+        state,
+        controller,
+        UIRect(0.0f, 0.0f, 1280.0f, 720.0f),
+        model,
+        { MakePointerMove(RectCenter(submenuItem->rect)) });
+    ASSERT_EQ(frame.request.popupRequests.size(), 2u);
+
+    model.resolvedMenuModel.menus[0].items[0].enabled = false;
+    frame = UpdateUIEditorShellInteraction(
+        state,
+        controller,
+        UIRect(0.0f, 0.0f, 1280.0f, 720.0f),
+        model,
+        {});
+
+    EXPECT_TRUE(frame.result.consumed);
+    EXPECT_TRUE(frame.result.menuMutation.changed);
+    EXPECT_EQ(frame.result.menuMutation.dismissReason, UIPopupDismissReason::Programmatic);
+    EXPECT_FALSE(state.menuSession.HasOpenMenu());
+    EXPECT_TRUE(frame.request.popupRequests.empty());
+}
+
+TEST(UIEditorShellInteractionTest, OpenedSubmenuClosesWhenSourceItemLosesChildren) {
+    auto controller = BuildController();
+    auto model = BuildInteractionModel();
+
+    UIEditorShellInteractionState state = {};
+    auto frame = UpdateUIEditorShellInteraction(
+        state,
+        controller,
+        UIRect(0.0f, 0.0f, 1280.0f, 720.0f),
+        model,
+        { MakeLeftPointerDown(UIPoint(40.0f, 30.0f)) });
+    const auto* submenuItem = FindPopupItem(frame, "file-workspace-tools");
+    ASSERT_NE(submenuItem, nullptr);
+
+    frame = UpdateUIEditorShellInteraction(
+        state,
+        controller,
+        UIRect(0.0f, 0.0f, 1280.0f, 720.0f),
+        model,
+        { MakePointerMove(RectCenter(submenuItem->rect)) });
+    ASSERT_EQ(frame.request.popupRequests.size(), 2u);
+
+    model.resolvedMenuModel.menus[0].items[0].children.clear();
+    frame = UpdateUIEditorShellInteraction(
+        state,
+        controller,
+        UIRect(0.0f, 0.0f, 1280.0f, 720.0f),
+        model,
+        {});
+
+    EXPECT_TRUE(frame.result.consumed);
+    EXPECT_TRUE(frame.result.menuMutation.changed);
+    EXPECT_EQ(frame.result.menuMutation.dismissReason, UIPopupDismissReason::Programmatic);
+    EXPECT_FALSE(state.menuSession.HasOpenMenu());
+    EXPECT_TRUE(frame.request.popupRequests.empty());
+}