I'm pretty sure I made two comments on this question yesterday, one of which I deleted. However, today I have no comments on the question?
Just curious what happened to my comment?
UPDATE 2018-05-20: This just happened again. On this question. And the scenario was similar... I wrote one (short) comment on the question itself that I later deleted and then wrote another (longer) comment, which has since vanished? So, at the time of writing, there are no comments that remain. This time I was definitely on a wired/reliable connection.