A few hours ago, I posted a comment and an answer to a question (deleted questions are only visible for users with enough rep). Someone had found a nonstandard parameterization of the negative binomial distribution in some paper; I commented whether they could add a link to the paper and a few minutes later answered that the parameterization was nonsensical, because the PMF would be convex.
Now the question seems to have disappeared down the memory hole.
It's not among the questions on the main page. It's not among the "recently deleted" questions. I see neither my comment nor my answer in my profile.
That's not the first time something like this has happened to me. It's a bit frustrating to invest a couple of minutes on a post and then have it simply disappear. Can anyone (mods?) tell me what is going on?