### 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)

List<Node *> stray_instances;
#define NODE_FROM_ID(p_name, p_id)                      \
	Node *p_name;                                       \
	if (p_id & FLAG_ID_IS_PATH) {                       \
		NodePath np = node_paths[p_id & FLAG_MASK];     \
		p_name = ret_nodes[0]->get_node_or_null(np);    \
	} else {                                            \
		ERR_FAIL_INDEX_V(p_id &FLAG_MASK, nc, nullptr); \
		p_name = ret_nodes[p_id & FLAG_MASK];           \
	}
	int nc = nodes.size();
	ERR_FAIL_COND_V(nc == 0, nullptr);
	const StringName *snames = nullptr;
	int sname_count = names.size();
	if (sname_count) {
		snames = &names[0];
	}
	const Variant *props = nullptr;
	int prop_count = variants.size();
	if (prop_count) {
		props = &variants[0];
	}