If I knew why they kept happening, I'd do something to prevent them.
As it is, false positives keep happening, and then stopping with the very next antivirus definitions update. And this is happening with Microsoft defender and several other antivirus products. To the extent that there's news here, it's that antivirus creators are doing a crappy job. Or some of them are, anyway.
Anyway, I wasn't telling anyone to be quiet. If I thought the post was unacceptable, I'd have deleted it. I meant what I said literally.