@quid I literally think it's from deleting downvoted answers, or unaccepting answers, I only have 1 recently deleted question only had 2 downvotes when I looked. my closed question has a downvote.
@RoddyMacPhee do you know when it kicked in? It might be in place since some time without you noticing. Also the reduction of points via boutnies might have played a role. I am also speculating a bit as I do not know the excact criteria at the moment (or at all).
I know it's been a while, but not really. I also know about the question ban failure glitch. I have deleted a few meta answers, they were pointless and grammar searched by the person asking. if they can grammar search me they can find the LaTeX wikibook and search for the meaning next time.