I lost most of the blocks in my most recent project. Even the link stopped working. It was called “Streams blocks”. It existed! And none of the older versions are retrievable (there’s only today 00:59:00, and 00:59:20, CET). System: iPad Pro-2 (2017), Safari.
I will be able to reconstruct it. It’s just that I experienced something similar a few months ago, and it’s a lot of (unsatisfying) work. I do have most if the code in other projects, I wrote comments / help just now which is all lost.