Me too, just last night, but my problem in this case was that I didnt get a preview on either my machine or the server. A different problem most likely but this is still something everybody should be aware of. There was literally no preview anywhere, and no file to revert to. I went back into manual backup which is the only thing I trust anymore, only lost 10 minutes of work, and recopied all items into a new Hype file, problem gone.
(There is no video on this page but I will drop in those additions to htaccess in any case)
This is more of a "best practices" kind of thing that COULD be related..maybe. Daniel replied to me in another thread stating that I should not use iCloud as a parking place for files. Right now, I need to work in two locations, using desktop at home and Macbook at the office for awhile. I have stopped doing that and I am having far less problems. I now use a USB file transfer cable, but even then I am questioning the effect of moving files as much as I do.
(There is no video on this page but I will drop in those additions to htaccess in any case, I did that 2 or 3 years ago, but it, at this time, was no longer there.)
I don't know if it is related to what you are asking but I also think; try to avoid it if at all possible.
Sorry for the long, possibly unrelated story, but I think it is worth passing on.