### Godot version

4.0-rc6

### System information

Fedora 37, Mesa Intel ADL GT2

### Issue description

Code that works as expected at runtime fails with Nil references to (assigned) exported vars in the editor:

![tool_global_position_error](https://user-images.githubusercontent.com/364501/222031460-ffb1ecbd-5175-4a42-8470-25285ba5f821.png)


### Steps to reproduce

Try to access the `global_position` of a `Node3D` that's assigned to an exported var.

See that it works at runtime.

See that it errors in the editor with:

> Invalid get index 'global_position' (on base: 'Nil').

### Minimal reproduction project

[tool_test.zip](https://github.com/godotengine/godot/files/10856640/tool_test.zip)

edit->set_disabled(p_read_only);
}
void EditorPropertyObjectID::_edit_pressed() {
	emit_signal(SNAME("object_id_selected"), get_edited_property(), get_edited_property_value());
}
void EditorPropertyObjectID::update_property() {
	String type = base_type;
	if (type.is_empty()) {
		type = "Object";
	}
	ObjectID id = get_edited_property_value();
	if (id.is_valid()) {
		edit->set_text(type + " ID: " + uitos(id));
		edit->set_tooltip_text(type + " ID: " + uitos(id));
		edit->set_disabled(false);
		edit->set_icon(EditorNode::get_singleton()->get_class_icon(type));
	} else {
		edit->set_text(TTR("<empty>"));
		edit->set_tooltip_text("");
		edit->set_disabled(true);
		edit->set_icon(Ref<Texture2D>());
	}
}
void EditorPropertyObjectID::setup(const String &p_base_type) {
	base_type = p_base_type;
}
void EditorPropertyObjectID::_bind_methods() {