### 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)

} else {
				
				Viewport *viewport = get_viewport();
				ERR_FAIL_NULL(viewport);
				data.RI = viewport->_gui_add_root_control(this);
				get_parent()->connect(SNAME("child_order_changed"), callable_mp(get_viewport(), &Viewport::gui_set_root_order_dirty), CONNECT_REFERENCE_COUNTED);
			}
			data.parent_canvas_item = get_parent_item();
			if (data.parent_canvas_item) {
				data.parent_canvas_item->connect("item_rect_changed", callable_mp(this, &Control::_size_changed));
			} else {
				
				Viewport *viewport = get_viewport();
				ERR_FAIL_NULL(viewport);
				viewport->connect("size_changed", callable_mp(this, &Control::_size_changed));
			}
		} break;
		case NOTIFICATION_EXIT_CANVAS: {
			if (data.parent_canvas_item) {
				data.parent_canvas_item->disconnect("item_rect_changed", callable_mp(this, &Control::_size_changed));
				data.parent_canvas_item = nullptr;
			} else {
				
				Viewport *viewport = get_viewport();
				ERR_FAIL_NULL(viewport);
				viewport->disconnect("size_changed", callable_mp(this, &Control::_size_changed));
			}
			if (data.RI) {
				get_viewport()->_gui_remove_root_control(data.RI);
				data.RI = nullptr;