What Happened: Adobe Creative Cloud Update Bug
www.backblaze.com/blog/adobe-creative-cloud-update-bug
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
This meant that if you were an Adobe Creative Cloud customer on Mac with auto-update turned on (or happened to download that version), as soon as you signed in to Creative Cloud, files from folders within your root directory could have been removed.