The non-LLM version of this happened to me in a high school English class, back in the 2010's. I was accused of turning in a downloaded story from the internet, but in reality, I had pushed past the incredible barrier I usually felt at the start of a task, got into the flow, and started enjoying it.

I'm not sure if it had any lasting effects. Maybe a burning hatred of Grammarly ads.

~30 years ago I sat down with two students and accused them of copying each others’ work, because they both made the same amusing mistake: they called their C functions without passing arguments, but they declared their variables in such a way that the values would coincidentally be in the right place on the stack. I have to imagine debugging their own code was a mystery.

They indicated that while they worked closely together while learning the material, they weren’t stealing from each other. I believed them then, and still believe them now, but I’m so glad I don’t have to deal with today’s AI world.