This question already has an answer here:
I asked Question #1, which I later removed since it was considered off-topic. So I do not even know now the OP number.
I also asked later this related Question #2, which applied under different conditions. But it was considered in comments as a dupe of the first one by two "highly voted" people (logically implying it was off-topic, for the same reasons as the first one), and it had 4 close votes.
In an exchange in comments, it appeared to me that the dupe labeling was not justified, so I concluded the dupe labeling was more based on me being the OP than on the contents of the question. This is per se undesirable, I guess.
Taking a chance at getting answers, I fixed the question with more details.
In the meantime, and in a matter of a couple of minutes, all comments disappeared, including mine. It might have been that the two people who posted them decided to remove them (even if one of them seemed not present in SU since a few hours ago). But also comments from me disappeared, so my first guess is that some admin decided to do so. And I am certain these comments were not offensive in any means.
Is that something expected to happen? (not by me).
[EDIT]: An answer to this question does not seem to be available in any of the two questions linked above.