### 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)

Vector<Property> properties;
		Vector<int> groups;
	};
	struct DeferredNodePathProperties {
		Node *base = nullptr;
		StringName property;
		NodePath path;
	};
	Vector<NodeData> nodes;
	struct ConnectionData {
		int from = 0;
		int to = 0;
		int signal = 0;
		int method = 0;
		int flags = 0;
		int unbinds = 0;
		Vector<int> binds;
	};
	Vector<ConnectionData> connections;
	Error _parse_node(Node *p_owner, Node *p_node, int p_parent_idx, HashMap<StringName, int> &name_map, HashMap<Variant, int, VariantHasher, VariantComparator> &variant_map, HashMap<Node *, int> &node_map, HashMap<Node *, int> &nodepath_map);
	Error _parse_connections(Node *p_owner, Node *p_node, HashMap<StringName, int> &name_map, HashMap<Variant, int, VariantHasher, VariantComparator> &variant_map, HashMap<Node *, int> &node_map, HashMap<Node *, int> &nodepath_map);
	String path;
	uint64_t last_modified_time = 0;
	static bool disable_placeholders;
	Vector<String> _get_node_groups(int p_idx) const;
	int _find_base_scene_node_remap_key(int p_idx) const;
protected:
	static void _bind_methods();
public:
	enum {