### 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)

nd.properties.write[j].value = r[idx++];
			}
			nd.groups.resize(r[idx++]);
			for (int j = 0; j < nd.groups.size(); j++) {
				nd.groups.write[j] = r[idx++];
			}
		}
	}
	connections.resize(conn_count);
	if (conn_count) {
		const int *r = sconns.ptr();
		int idx = 0;
		for (int i = 0; i < conn_count; i++) {
			ConnectionData &cd = connections.write[i];
			cd.from = r[idx++];
			cd.to = r[idx++];
			cd.signal = r[idx++];
			cd.method = r[idx++];
			cd.flags = r[idx++];
			cd.binds.resize(r[idx++]);
			for (int j = 0; j < cd.binds.size(); j++) {
				cd.binds.write[j] = r[idx++];
			}
			if (version >= 3) {
				cd.unbinds = r[idx++];
			}
		}
	}
	Array np;
	if (p_dictionary.has("node_paths")) {