I have suspicions that there is middleware somewhere for the ChatGPT interface to the chat models underneath; something to enclose the normal prompt, to update

I have suspicions that there is middleware somewhere for the ChatGPT interface to the chat models underneath; something to enclose the normal prompt, to update weights, or to manipulate logits. Just last night I began seeing a behavior that I could formerly reproduce 100% of the time: asking it to critically evaluate my instructions, explaining why it didn’t follow them, and suggest rewrites. Since the beginning of ChatGPT itself, it would reliably answer that every time. As of last night, it flat out refused to, assuring me of its sincere apologies and confidently stating it’ll follow my instructions better from now on.