### 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)

ERR_MAIN_THREAD_GUARD;
	for (int i = 0; i < 4; i++) {
		data.anchor[i] = ANCHOR_BEGIN;
	}
	_compute_offsets(p_rect, data.anchor, data.offset);
	if (is_inside_tree()) {
		_size_changed();
	}
}
Rect2 Control::get_rect() const {
	ERR_READ_THREAD_GUARD_V(Rect2());
	Transform2D xform = get_transform();
	return Rect2(xform.get_origin(), xform.get_scale() * get_size());
}
Rect2 Control::get_global_rect() const {
	ERR_READ_THREAD_GUARD_V(Rect2());
	Transform2D xform = get_global_transform();
	return Rect2(xform.get_origin(), xform.get_scale() * get_size());
}
Rect2 Control::get_screen_rect() const {
	ERR_READ_THREAD_GUARD_V(Rect2());
	ERR_FAIL_COND_V(!is_inside_tree(), Rect2());
	Transform2D xform = get_screen_transform();
	return Rect2(xform.get_origin(), xform.get_scale() * get_size());
}
Rect2 Control::get_anchorable_rect() const {
	ERR_READ_THREAD_GUARD_V(Rect2());
	return Rect2(Point2(), get_size());
}
void Control::set_scale(const Vector2 &p_scale) {