### 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)

} else if (Object::cast_to<Node3D>(ret_nodes[n.parent])) {
							obj = memnew(Node3D);
#endif 
						}
					}
					if (!obj) {
						obj = memnew(Node);
					}
					node = Object::cast_to<Node>(obj);
				}
			}
		}
		if (node) {
			
			
			
			int nprop_count = n.properties.size();
			if (nprop_count) {
				const NodeData::Property *nprops = &n.properties[0];
				Dictionary missing_resource_properties;
				for (int j = 0; j < nprop_count; j++) {
					bool valid;
					ERR_FAIL_INDEX_V(nprops[j].value, prop_count, nullptr);
					if (nprops[j].name & FLAG_PATH_PROPERTY_IS_NODE) {
						uint32_t name_idx = nprops[j].name & (FLAG_PATH_PROPERTY_IS_NODE - 1);
						ERR_FAIL_UNSIGNED_INDEX_V(name_idx, (uint32_t)sname_count, nullptr);
						const StringName &prop_name = snames[name_idx];
						const Variant &prop_variant = props[nprops[j].value];
						if (prop_variant.get_type() == Variant::ARRAY) {
							if (Engine::get_singleton()->is_editor_hint()) {