### 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)

string_name = p_string_name;
	loose_mode = p_loose_mode;
	options.clear();
	if (loose_mode) {
		
		option_button->add_item("", options.size() + 1000);
	}
	for (int i = 0; i < p_options.size(); i++) {
		options.append(p_options[i]);
		option_button->add_item(p_options[i], i);
	}
	if (loose_mode) {
		edit_button->show();
	}
}
void EditorPropertyTextEnum::_bind_methods() {