### Godot version

4.1 dev2, 4.0.3

### System information

Windows 10, ryzen 5900x, radeon 6950xt (driver: 23.2.2)

### Issue description

There are two bugs:
- When I create a new node, it is created outside of the viewport. (as in first video)
- When I run the project, all the content inside the viewport dont appear. (as in second video)
I believe the second issue is related to the first.

Note: these problems are in RTL editors.

https://github.com/godotengine/godot/assets/121864036/84f0d434-0d1b-4c23-9fb0-510257e2e191


https://github.com/godotengine/godot/assets/121864036/b2bc20c7-1e2e-4d04-99e7-d66860ffced2




### Steps to reproduce

Videos explain.

### Minimal reproduction project

N/A
if (is_inside_tree()) {
		data.theme_owner->propagate_theme_changed(this, this, true, false);
	}
}
void Control::_notify_theme_override_changed() {
	if (!data.bulk_theme_override && is_inside_tree()) {
		notification(NOTIFICATION_THEME_CHANGED);
	}
}
void Control::_invalidate_theme_cache() {
	data.theme_icon_cache.clear();
	data.theme_style_cache.clear();
	data.theme_font_cache.clear();
	data.theme_font_size_cache.clear();
	data.theme_color_cache.clear();
	data.theme_constant_cache.clear();
}
void Control::_update_theme_item_cache() {
}
void Control::set_theme_owner_node(Node *p_node) {
	ERR_MAIN_THREAD_GUARD;
	data.theme_owner->set_owner_node(p_node);
}
Node *Control::get_theme_owner_node() const {
	ERR_READ_THREAD_GUARD_V(nullptr);
	return data.theme_owner->get_owner_node();
}
bool Control::has_theme_owner_node() const {