### 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)

if (is_read_only()) {
		return;
	}
	if (reorder_from_index != reorder_to_index) {
		
		Variant array = object->get_array().duplicate();
		Variant value_to_move = array.get(reorder_from_index);
		array.call("remove_at", reorder_from_index);
		array.call("insert", reorder_to_index, value_to_move);
		emit_changed(get_edited_property(), array, "", false);
		update_property();
	}
	reorder_from_index = -1;
	reorder_to_index = -1;
	reorder_mouse_y_delta = 0.0f;
	Input::get_singleton()->set_mouse_mode(Input::MOUSE_MODE_VISIBLE);
	ERR_FAIL_NULL(reorder_selected_button);
	reorder_selected_button->warp_mouse(reorder_selected_button->get_size() / 2.0f);
	reorder_selected_element_hbox = nullptr;
	reorder_selected_button = nullptr;
}
void EditorPropertyArray::_bind_methods() {