### Godot version

543750a1b3f5696f9ba8e91cb49dc7db05d2ae62

### System information

Windows 10, Vulkan

### Issue description

This is a regression since v4.1.dev4.official [5c2295ff5], I can't bisect atm to find the commit that caused it, maybe https://github.com/godotengine/godot/pull/77651 but that's just a guess.
When a HBoxContainer has a label child, and that label's text is changed, one used to be able to find the new size of the container by using call_deferred, this is no longer the case.

MRP correct behavior (v4.1.dev4.official [5c2295ff5]):
![image](https://github.com/godotengine/godot/assets/115422160/1b4a2b6f-ef19-42c1-b3e5-9f0c499a7a8c)
MRP incorrect (543750a1b3f5696f9ba8e91cb49dc7db05d2ae62):
![image](https://github.com/godotengine/godot/assets/115422160/25b711ae-7c3a-4c48-aff7-383bb8f600c3)




### Steps to reproduce

```gdscript
extends Control

@onready var h_box_container: HBoxContainer = $HBoxContainer
@onready var label: Label = $HBoxContainer/Label

func _ready() -> void:
	label.text = "larger non default text"
	print("h_box_container size.x: ", h_box_container.size.x)
	call_deferred("size_after_text_changed")

func size_after_text_changed() -> void:
	print("deferred h_box_container size.x: ", h_box_container.size.x)
```

### Minimal reproduction project

[call_deferred bug.zip](https://github.com/godotengine/godot/files/11654441/call_deferred.bug.zip)

get_parent()->disconnect(SNAME("child_order_changed"), callable_mp(get_viewport(), &Viewport::gui_set_root_order_dirty));
			}
			data.parent_canvas_item = nullptr;
			data.is_rtl_dirty = true;
		} break;
		case NOTIFICATION_CHILD_ORDER_CHANGED: {
			
			
			queue_redraw();
		} break;
		case NOTIFICATION_RESIZED: {
			emit_signal(SceneStringNames::get_singleton()->resized);
		} break;
		case NOTIFICATION_DRAW: {
			_update_canvas_item_transform();
			RenderingServer::get_singleton()->canvas_item_set_custom_rect(get_canvas_item(), !data.disable_visibility_clip, Rect2(Point2(), get_size()));
			RenderingServer::get_singleton()->canvas_item_set_clip(get_canvas_item(), data.clip_contents);
		} break;
		case NOTIFICATION_MOUSE_ENTER: {
			emit_signal(SceneStringNames::get_singleton()->mouse_entered);
		} break;
		case NOTIFICATION_MOUSE_EXIT: {
			emit_signal(SceneStringNames::get_singleton()->mouse_exited);
		} break;
		case NOTIFICATION_FOCUS_ENTER: {
			emit_signal(SceneStringNames::get_singleton()->focus_entered);
			queue_redraw();
		} break;
		case NOTIFICATION_FOCUS_EXIT: {
			emit_signal(SceneStringNames::get_singleton()->focus_exited);