I do a lot of interviews, and the poor performers usually end up running out of working memory and start behaving very similar to an LLM. Corrections/input from me will go into one ear and fall out the other, they'll start hallucinating aspects of the problem statement in an attractor sort of way, they'll get stuck in loops, etc. I write down when this happens in my notes, and it's very consistently 15 minutes. For all of them, it seems to be the lack of familiarity doesn't allow them to compress/compartmentalize the problem into something that fits in their head. I suspect it's similar for the LLM.