Error adding railway layer

I added `'railway': {}'` to my config, and it results in the error `NotImplementedError: Multi-part geometries do not themselves provide the array interface`. I have also tried `'railway': {'custom_filter': '["railway"~"rail"]'}` and it gives `ValueError: Found no graph nodes within the requested polygon`. I have tested it without `railway` to ensure the output area does indeed contain a line with `railway=rail`.