Hi,
My Opera has Version 103.0.4892.0 and 15 minutes ago I lost all tabs in one workspace. What confuses me, in the directory session, where you normally find your backups, all of them are outdated a month ago. When I empty the previous directory there isn't even a new backup file generated at new browser start/close, so I think there is a new session save space?
But I lost only the tabs from one workspace and I didn't use that blue button on the right top corner. I closed normally, X.