### 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)

value_type = subtype;
			}
			if (value_type == Variant::OBJECT && Object::cast_to<EncodedObjectAsID>(value)) {
				EditorPropertyObjectID *editor = memnew(EditorPropertyObjectID);
				editor->setup("Object");
				prop = editor;
			} else {
				prop = EditorInspector::instantiate_property_editor(nullptr, value_type, "", subtype_hint, subtype_hint_string, PROPERTY_USAGE_NONE);
			}
			prop->set_object_and_property(object.ptr(), prop_name);
			prop->set_label(itos(i + offset));
			prop->set_selectable(false);
			prop->set_use_folding(is_using_folding());
			prop->connect("property_changed", callable_mp(this, &EditorPropertyArray::_property_changed));
			prop->connect("object_id_selected", callable_mp(this, &EditorPropertyArray::_object_id_selected));
			prop->set_h_size_flags(SIZE_EXPAND_FILL);
			prop->set_read_only(is_read_only());
			hbox->add_child(prop);
			bool is_untyped_array = array.get_type() == Variant::ARRAY && subtype == Variant::NIL;
			if (is_untyped_array) {
				Button *edit_btn = memnew(Button);
				edit_btn->set_icon(get_theme_icon(SNAME("Edit"), SNAME("EditorIcons")));
				hbox->add_child(edit_btn);
				edit_btn->set_disabled(is_read_only());
				edit_btn->connect("pressed", callable_mp(this, &EditorPropertyArray::_change_type).bind(edit_btn, i + offset));
			} else {
				Button *remove_btn = memnew(Button);
				remove_btn->set_icon(get_theme_icon(SNAME("Remove"), SNAME("EditorIcons")));
				remove_btn->set_disabled(is_read_only());
				remove_btn->connect("pressed", callable_mp(this, &EditorPropertyArray::_remove_pressed).bind(i + offset));