### 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)

set_global_position(p_point);
}
void Control::set_global_position(const Point2 &p_point, bool p_keep_offsets) {
	ERR_MAIN_THREAD_GUARD;
	Transform2D inv;
	if (data.parent_canvas_item) {
		inv = data.parent_canvas_item->get_global_transform().affine_inverse();
	}
	set_position(inv.xform(p_point), p_keep_offsets);
}
Point2 Control::get_global_position() const {
	ERR_READ_THREAD_GUARD_V(Point2());
	return get_global_transform().get_origin();
}
Point2 Control::get_screen_position() const {
	ERR_READ_THREAD_GUARD_V(Point2());
	ERR_FAIL_COND_V(!is_inside_tree(), Point2());
	return get_screen_transform().get_origin();
}
void Control::_set_size(const Size2 &p_size) {
#ifdef DEBUG_ENABLED
	if (data.size_warning && (data.anchor[SIDE_LEFT] != data.anchor[SIDE_RIGHT] || data.anchor[SIDE_TOP] != data.anchor[SIDE_BOTTOM])) {
		WARN_PRINT("Nodes with non-equal opposite anchors will have their size overridden after _ready(). \nIf you want to set size, change the anchors or consider using set_deferred().");
	}
#endif
	set_size(p_size);
}
void Control::set_size(const Size2 &p_size, bool p_keep_offsets) {