People have been doing that long before LLMs, so i wouldn't be too sure haha

That sounds to me like human behaviour, an AI would probably respond to each element separately. A lot of people when faced with multiple pieces of information or questions will usually respond to at most half, and often only one thing, in my experience.

Worked in a lot of service desks where I asked multiple troubleshooting related questions, getting a reply to only one of them is really common, the norm even I would say.

That's almost unequivocal proof that a human did it. AI will restate each point and provide an answer, no matter how correct or useful. A human will get distracted, or omit or ignore points that they think are obvious or too difficult.

Or sold to advertisers...

Or your insurance company...

Or law enforcement...