I had a comment, but there was no comment button. Assuming I just hadn't joined the site, I thought, I'll put in an answer, which will join me, and then I can delete it and make it a comment.
It joined me to Math Overflow, but it still didn't give a comment option. Assuming it was a bug in the iOS app, I went to my laptop to fix it.
I deleted the answer and pasted the same text into a comment on the question. The reputation points of 115 dropped to 101. But the answer is on the rep list twice, with differing details. The list says I have 100, but it also says I have 101. If I add everything up, it is 100. But there is one downvote that had no effect (according to the list).
It sounds like a bug(?) reported years ago, but I don't think this is "because of the asynchronous loading of the content" when a page refresh ten minutes later gives the same thing.