Fix PopupMenu losing item highlight when hovering submenus

scene/gui/popup_menu.cpp

@@ -709,6 +709,9 @@ void PopupMenu::_input_from_window_internal(const Ref<InputEvent> &p_event) {
 		if (!minimum_lifetime_timer->is_stopped()) {
 			// The mouse left the safe area, but came back again, so cancel the auto-closing.
 			minimum_lifetime_timer->stop();
+			if (PopupMenu *parent_pum = Object::cast_to<PopupMenu>(get_parent())) {
+				parent_pum->_hover_active_submenu_item();
+			}
 		}
 
 		if (mouse_over == -1 && !item_clickable_area.has_point(m->get_position())) {
@@ -765,9 +768,12 @@ void PopupMenu::_mouse_over_update(const Point2 &p_over) {
 	int id = (over < 0 || items[over].separator || items[over].disabled) ? -1 : (items[over].id >= 0 ? items[over].id : over);
 
 	if (id < 0) {
-		mouse_over = -1;
-		queue_accessibility_update();
-		control->queue_redraw();
+		// Only remove the hover if there's no open submenu, or the mouse is in an item that can't be hovered.
+		if (over >= 0 || !(mouse_over >= 0 && items[mouse_over].submenu && items[mouse_over].submenu->is_visible())) {
+			mouse_over = -1;
+			queue_accessibility_update();
+			control->queue_redraw();
+		}
 		return;
 	}
 
@@ -1083,6 +1089,19 @@ Rect2i PopupMenu::_popup_adjust_rect() const {
 	return current;
 }
 
+void PopupMenu::_hover_active_submenu_item() {
+	for (int i = 0; i < items.size(); i++) {
+		if (items[i].submenu && items[i].submenu->is_visible()) {
+			if (mouse_over != i) {
+				mouse_over = i;
+				queue_accessibility_update();
+				control->queue_redraw();
+			}
+			return;
+		}
+	}
+}
+
 void PopupMenu::add_child_notify(Node *p_child) {
 	Window::add_child_notify(p_child);
 
@@ -1271,7 +1290,7 @@ void PopupMenu::_notification(int p_what) {
 		} break;
 
 		case NOTIFICATION_WM_MOUSE_EXIT: {
-			if (mouse_over >= 0 && (!items[mouse_over].submenu || submenu_over != -1)) {
+			if (mouse_over >= 0 && (!items[mouse_over].submenu || !items[mouse_over].submenu->is_visible())) {
 				mouse_over = -1;
 				queue_accessibility_update();
 				control->queue_redraw();

scene/gui/popup_menu.h

@@ -228,6 +228,8 @@ class PopupMenu : public Popup {
 	String _atr(int p_idx, const String &p_text) const;
 
 protected:
+	void _hover_active_submenu_item();
+
 	virtual void _pre_popup() override;
 	virtual Rect2i _popup_adjust_rect() const override;