Marco, I’m not sure there is a bug.

Although not creating a derivative work, Sony would be distributing under terms of BY-SA, which would require them to provide license notice.

As Sony distributed under terms of BY-SA, anyone who wanted could take the track under those terms, which could include redistribution or derivatives, still governed by BY-SA.

So Sony can’t put ARR on a BY-SA work even if they don’t create a derivative.

But I could be missing something, as I’m not a lawyer, and I just miss stuff. :-)