### 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)

emit_signal(SNAME("object_id_selected"), p_property, p_id);
}
void EditorPropertyArray::update_property() {
	Variant array = get_edited_property_value();
	String array_type_name = Variant::get_type_name(array_type);
	if (array_type == Variant::ARRAY && subtype != Variant::NIL) {
		String type_name;
		if (subtype == Variant::OBJECT && (subtype_hint == PROPERTY_HINT_RESOURCE_TYPE || subtype_hint == PROPERTY_HINT_NODE_TYPE)) {
			type_name = subtype_hint_string;
		} else {
			type_name = Variant::get_type_name(subtype);
		}
		array_type_name = vformat("%s[%s]", array_type_name, type_name);
	}
	if (array.get_type() == Variant::NIL) {
		edit->set_text(vformat(TTR("(Nil) %s"), array_type_name));
		edit->set_pressed(false);
		if (container) {
			set_bottom_editor(nullptr);
			memdelete(container);
			button_add_item = nullptr;