crash after saving and restoring simulation and generating flowmap

Using this code to dump:

    guid = str(uuid.uuid4())
    folder_path = os.path.join(tempfile.gettempdir(), guid)
    os.mkdir(folder_path)
    sim_res.save(os.path.join(folder_path, "pywake_simulation_result"))

and this code to restore:

        sim_res = SimulationResult.load(
            os.path.join(folder_path, "pywake_simulation_result"), 
            wf_model
        )

Calling flow_map function on the loaded sim_res crash, something about missing x and y datasets.