### 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_READ_THREAD_GUARD_V(Ref<Font>());
	return data.theme_owner->get_theme_default_font();
}
int Control::get_theme_default_font_size() const {
	ERR_READ_THREAD_GUARD_V(0);
	return data.theme_owner->get_theme_default_font_size();
}
void Control::begin_bulk_theme_override() {
	ERR_MAIN_THREAD_GUARD;
	data.bulk_theme_override = true;
}
void Control::end_bulk_theme_override() {
	ERR_MAIN_THREAD_GUARD;
	ERR_FAIL_COND(!data.bulk_theme_override);
	data.bulk_theme_override = false;
	_notify_theme_override_changed();
}
TypedArray<Vector3i> Control::structured_text_parser(TextServer::StructuredTextParser p_parser_type, const Array &p_args, const String &p_text) const {
	ERR_READ_THREAD_GUARD_V(TypedArray<Vector3i>());
	if (p_parser_type == TextServer::STRUCTURED_TEXT_CUSTOM) {
		TypedArray<Vector3i> ret;
		GDVIRTUAL_CALL(_structured_text_parser, p_args, p_text, ret);
		return ret;
	} else {
		return TS->parse_structured_text(p_parser_type, p_args, p_text);
	}
}
void Control::set_layout_direction(Control::LayoutDirection p_direction) {