Asking it to grammar-check a sentence can sometimes get you a lecture on the content of the sentence, if that helps. Should be simple enough to find an example - just ask it to grammar-check a speech from one of the loonier Republicans.

Explaining it to you will not fix my problems with OpenAI's instance. Let it suffice that I am a user of ChatGPT who really dislikes the lecturing style of woke-fine-tuning. If a human would lecture me in that style, I'd dumb them and avoid contact.