### 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)

Dictionary missing_resource_properties = p_node->get_meta(META_MISSING_RESOURCES, Dictionary());
	for (const PropertyInfo &E : plist) {
		if (!(E.usage & PROPERTY_USAGE_STORAGE)) {
			continue;
		}
		if (E.name == META_PROPERTY_MISSING_RESOURCES) {
			continue; 
		}
		if (E.name.begins_with(PackedScene::META_POINTER_PROPERTY_BASE)) {
			continue; 
		}
		
		if (!states_stack.is_empty()) {
			if ((E.usage & PROPERTY_USAGE_NO_INSTANCE_STATE)) {
				continue;
			}
		}
		StringName name = E.name;
		Variant value = p_node->get(name);
		bool use_deferred_node_path_bit = false;
		if (E.type == Variant::OBJECT && E.hint == PROPERTY_HINT_NODE_TYPE) {
			value = p_node->get(PackedScene::META_POINTER_PROPERTY_BASE + E.name);
			if (value.get_type() != Variant::NODE_PATH) {
				continue; 
			}
			use_deferred_node_path_bit = true;
		} else if (E.type == Variant::OBJECT && missing_resource_properties.has(E.name)) {
			
			Ref<Resource> ures = value;
			if (ures.is_null()) {