diff --git a/scene/gui/popup_menu.cpp b/scene/gui/popup_menu.cpp
index 436dda41a48..4c84f2cee3e 100644
--- a/scene/gui/popup_menu.cpp
+++ b/scene/gui/popup_menu.cpp
@@ -557,6 +557,21 @@ void PopupMenu::_notification(int p_what) {
 				mouse_over = -1;
 				update();
 			}
+
+			for (int i = 0; i < items.size(); i++) {
+				if (items[i].submenu == "")
+					continue;
+
+				Node *n = get_node(items[i].submenu);
+				if (!n)
+					continue;
+
+				PopupMenu *pm = Object::cast_to<PopupMenu>(n);
+				if (!pm || !pm->is_visible())
+					continue;
+
+				pm->hide();
+			}
 		} break;
 	}
 }
@@ -1012,8 +1027,7 @@ bool PopupMenu::activate_item_by_event(const Ref<InputEvent> &p_event, bool p_fo
 			code |= KEY_MASK_SHIFT;
 	}
 
-	int il = items.size();
-	for (int i = 0; i < il; i++) {
+	for (int i = 0; i < items.size(); i++) {
 		if (is_item_disabled(i) || items[i].shortcut_is_disabled)
 			continue;
 
diff --git a/scene/main/viewport.cpp b/scene/main/viewport.cpp
index d1b3eb9d9aa..ded32aa2706 100644
--- a/scene/main/viewport.cpp
+++ b/scene/main/viewport.cpp
@@ -1859,8 +1859,16 @@ void Viewport::_gui_input_event(Ref<InputEvent> p_event) {
 				MenuButton *popup_menu_parent = NULL;
 				MenuButton *menu_button = Object::cast_to<MenuButton>(over);
 
-				if (popup_menu)
+				if (popup_menu) {
 					popup_menu_parent = Object::cast_to<MenuButton>(popup_menu->get_parent());
+					if (!popup_menu_parent) {
+						// Go through the parents to see if there's a MenuButton at the end.
+						while (Object::cast_to<PopupMenu>(popup_menu->get_parent())) {
+							popup_menu = Object::cast_to<PopupMenu>(popup_menu->get_parent());
+						}
+						popup_menu_parent = Object::cast_to<MenuButton>(popup_menu->get_parent());
+					}
+				}
 
 				// If the mouse is over a menu button, this menu will open automatically
 				// if there is already a pop-up menu open at the same hierarchical level.