Sync not retrieving previous session

millean

millean

TL;DR

How do I restore a synced session after updating/reinstalling Opera?
If the correct way is not to toggle sync back on after logging in again, then what is it??

My Opera browser got updated by itself. Seems like it was a major update, so it logged me out.
After the update, I opened some pdfs with Opera or something, but I didn't log in because I wasn't using it much.
When I finally went to log in again, to restore all the workspaces and tabs that I was working with, it didn't happen as I was expecting. Turning sync on didn't bring back my stuff, it overwrote almost everything* with the single "Opera Update Complete" tab. Is there a way to get all of my work back?
*I think my workspaces got restored properly because of their names, but they are empty... My extensions were also not restored, the list is empty, but I think my theme was also restored.
I am sure that the session was properly synced to my account before logging in, because I accessed https://www.sync.opera.com/tabs on another browser beforehand to check my 100ish tabs session worth of data was there. I would have exported (saved) it first just in case, but there didn't seem to be an option for that.

I'm honestly kinda pissed because I suspect there might be no way to recover the session that seems to have been overwritten. Does anyone have any information about this?