Sorry for the late response, but I had finally some time to fill a bug report and it is now reported as FB24119692 with a minimal example for reproduction. I have also tried the getattrlistbulk api with no success..

I saw this post, but have not found anything there about the "one file works, separate files crashes" aspect. So I submitted a post. But in general yes, it is also about sorting on optional nested relationships.

I saw this post, but have not found anything there about the "one file works, separate files crashes" aspect. So I submitted a post. But in general yes, it is also about sorting on optional nested relationships.

I have seen this post, but I am have found nothing there about the "one file crashes, separate files work" aspect, so I submitted this post there. But in general, yes: Optionally, nested relationships sorting