This is a follow-up of the update to the answer to this question. After that question, I thought everyone had to wait 2 days before accepting a self-answer. Yet today, as the answer says, I posted and accepted a self-answer in less than 10s. Here are images that prove it:
"answered just now" and accepted
Data about the question.
The link to the question can be found on the linked question's answer. So is there a bug in this time delay feature? Or is there a maximum time after which the time delay is removed from a question which has received no answers, votes, or comments in that time from posting? And if so, what is that time and what are the precise rules?