It's probably working from/stuck in some very sparse space, resulting in relatively poor output. It's a neural network after all. Telling it to fix its grammar

It's probably working from/stuck in some very sparse space, resulting in relatively poor output. It's a neural network after all. Telling it to fix its grammar, in a new thread fixes it. I also confidently assume that telling it to fix its grammar, within the original, topic specific, conversation, would noticeably harm the quality of subsequent output for that topic.