### 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;
	ERR_FAIL_COND(!is_inside_tree());
	get_viewport()->warp_mouse(get_global_transform_with_canvas().xform(p_position));
}
void Control::set_shortcut_context(const Node *p_node) {
	ERR_MAIN_THREAD_GUARD;
	if (p_node != nullptr) {
		data.shortcut_context = p_node->get_instance_id();
	} else {
		data.shortcut_context = ObjectID();
	}
}
Node *Control::get_shortcut_context() const {
	ERR_READ_THREAD_GUARD_V(nullptr);
	Object *ctx_obj = ObjectDB::get_instance(data.shortcut_context);
	Node *ctx_node = Object::cast_to<Node>(ctx_obj);
	return ctx_node;
}
bool Control::is_focus_owner_in_shortcut_context() const {
	ERR_READ_THREAD_GUARD_V(false);
	if (data.shortcut_context == ObjectID()) {
		
		return true;
	}
	const Node *ctx_node = get_shortcut_context();
	const Control *vp_focus = get_viewport() ? get_viewport()->gui_get_focus_owner() : nullptr;
	
	return ctx_node && vp_focus && (ctx_node == vp_focus || ctx_node->is_ancestor_of(vp_focus));
}
void Control::set_drag_forwarding(const Callable &p_drag, const Callable &p_can_drop, const Callable &p_drop) {