I have found out something the hard way - maybe it's common sense to y'all but when grok prompts to feedback how a generation turned out, do NOT give a negative feedback on that smiley scale thing.

I was using a prompt that generated what I wanted reliably, until one generation that made the body behave weirdly. Got the prompt for feedback and without thinking I picked negative, and when it promoted for the reason I picked something along the lines of "bad physics".

Ever since then the prompt mostly doesn't even get past the first 0% check and gets moderated instantly.