> You change the prompt slightly, where a human who understands the topic would still give the right response trivially, the LLM outputs an answer that is both wrong/irrelevant and unpredicably and non-humanly wrong in a way that no human who exhibited understanding with the first answer could be predicted to answer the second question in the same bizarrw manner as the LLM.

I think this should make you question whether the prompt change was really as trivial as you imply. Providing an example of this would elucidate.