I lead security at Sourcegraph and have been overseeing the incident investigation and resolution. To give you more specific details, I can say that we saw that

I lead security at Sourcegraph and have been overseeing the incident investigation and resolution. To give you more specific details, I can say that we saw that the attacker viewed a page where they would have only seen the first 20 items, and we were able to determine what those were at the time of viewing because of stable sorting.