[CPLX]

That seems to be pretty clearly what this article is saying.

And it's a goddamm disaster if that's the case.

[_mikz]

I just tried that (https://news.ycombinator.com/item?id=9888649) and it finished syncing the moved files. So no harm done and it even appeared in the iCloud.com Settings > Data & Security where I could recover it.

[brazzledazzle]

It's possible they fixed it or it's isolated to specific versions.