I have SYNC activated on several devices (PC, tablet and mobile).
I accidentally deleted the vault folder on my PC. When I opened Obsidian I chose “Open Vault from Obsydian Sync”. The new empty folder became the new version of the vault, with nothing in it. When I checked on my other devices it was the same result, everything empty.
I decided to check on sync versions to go back to previous ones, but I only got versions from 5 months ago (the moment when I started using it and playing with plugins).
Please, if someone has an idea or it is a real bug. I have a lot of PhD thesis work on Obsidian (not everything is backed up).