When accessing the REST API, If you apply "include=albums" to a 'catalog/<storefront>/songs' endpoint requests with a filter on ISRC, the API will, without fail, return a 504 error status.
If you remove the 'include=albums' and/or replace it with something like 'include=artists' it works fine.
This has been like this for months and we need to get album details back with these requests.
Could the Apple team please respond and verify the issue as it's blocking production for us.
Thanks.