LoadingRenderer not being used

I am using an overridden loading renderer, but it does not seem to be getting used?

```
const LoadingRenderer: ILoadingRendererConfig = ({document, fileName}) => {
const fileText = fileName || document?.fileType || "";
console.log(document);
return (
<>
);

}
```

It is called here:

```





```

But the loading message on the viewer still says 'Loading...'