Vlad I just lost all of my bookmarks on the latest beta [Version 0.99.110-beta (WebKit 613.1.12)] on macOS Catalina 10.15.7
I'm not sure exactly when this happened, but I remember saving all tabs in a window (Window Switcher > This Window > Bookmark All Tabs). Then I quit the app. When I opened Orion again, I got a crash report and I'm not sure what caused it, but now I suspect that it might have been related to this loss of bookmarks.
I have saved all the tabs In a window via this method before but haven't really lost bookmarks before so I'm not sure what would be the exact steps to reproduce it. Maybe the crash report which I sent before might be of some use (I haven't attached any details/mail with it so it may be harder to find. I sent it a while back(less than 2 hrs ago though)
This is a really serious issue as I just saved some newer 5-10 tabs in bookmarks and didn't really have time to make a backup.