### Godot version

v4.2.beta2.official [f8818f85e]

### System information

Windows 10, 64bit

### Issue description

Some times can't add node in visualshader editor

### Steps to reproduce

1. Open a VisualShader file for edit.
2. Click the `Add Node...` button, it will popup menu, it is OK.
3. Direct close the menu.
4. Clikd the `Add Node...` again, the menu can't popup.
![GIF](https://github.com/godotengine/godot/assets/35988767/1326c63e-3e05-4423-9ec7-7ce305b3f4f5)

### Minimal reproduction project

/
VisualShader::Type type = get_current_shader_type();
	Ref<VisualShaderNodeGroupBase> node = visual_shader->get_node(type, p_node);
	if (node.is_null()) {
		return;
	}
	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
	undo_redo->create_action(TTR("Remove Input Port"));
	List<VisualShader::Connection> conns;
	visual_shader->get_node_connections(type, &conns);
	for (const VisualShader::Connection &E : conns) {
		int cn_from_node = E.from_node;
		int cn_from_port = E.from_port;
		int cn_to_node = E.to_node;
		int cn_to_port = E.to_port;
		if (cn_to_node == p_node) {
			if (cn_to_port == p_port) {
				undo_redo->add_do_method(visual_shader.ptr(), "disconnect_nodes", type, cn_from_node, cn_from_port, cn_to_node, cn_to_port);
				undo_redo->add_undo_method(visual_shader.ptr(), "connect_nodes_forced", type, cn_from_node, cn_from_port, cn_to_node, cn_to_port);
				undo_redo->add_do_method(graph_plugin.ptr(), "disconnect_nodes", type, cn_from_node, cn_from_port, cn_to_node, cn_to_port);
				undo_redo->add_undo_method(graph_plugin.ptr(), "connect_nodes", type, cn_from_node, cn_from_port, cn_to_node, cn_to_port);
			} else if (cn_to_port > p_port) {
				undo_redo->add_do_method(visual_shader.ptr(), "disconnect_nodes", type, cn_from_node, cn_from_port, cn_to_node, cn_to_port);
				undo_redo->add_undo_method(visual_shader.ptr(), "connect_nodes_forced", type, cn_from_node, cn_from_port, cn_to_node, cn_to_port);
				undo_redo->add_do_method(graph_plugin.ptr(), "disconnect_nodes", type, cn_from_node, cn_from_port, cn_to_node, cn_to_port);
				undo_redo->add_undo_method(graph_plugin.ptr(), "connect_nodes", type, cn_from_node, cn_from_port, cn_to_node, cn_to_port);
				undo_redo->add_do_method(visual_shader.ptr(), "connect_nodes_forced", type, cn_from_node, cn_from_port, cn_to_node, cn_to_port - 1);
				undo_redo->add_undo_method(visual_shader.ptr(), "disconnect_nodes", type, cn_from_node, cn_from_port, cn_to_node, cn_to_port - 1);
				undo_redo->add_do_method(graph_plugin.ptr(), "connect_nodes", type, cn_from_node, cn_from_port, cn_to_node, cn_to_port - 1);