### 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)

const Dictionary drag_data = p_data;
	if (!drag_data.has("type")) {
		return false;
	}
	if (String(drag_data["type"]) != "files") {
		return false;
	}
	const Vector<String> filesPaths = drag_data["files"];
	if (filesPaths.size() == 0) {
		return false;
	}
	for (const String &extension : extensions) {
		if (filesPaths[0].ends_with(extension.substr(1, extension.size() - 1))) {
			return true;
		}
	}
	return false;
}
void EditorPropertyPath::_bind_methods() {