Does the terraform provider only surface the error response status code or do you mean that it failed and the response did NOT include a body with any additional details. If there’s no response body or the body is not surfaced by the tooling this can be a bit more complex to troubleshoot.
Is it possible for you to share the tenant name where this happens? This could allow us to check service logs; if you’re wary of sharing a production tenant name you can always create a temporary tenant just to reproduce this situation and share that one.