@burnout426 Yeh, it never used to do this however, I used to be able to see 2 devices and then each device with just the open tabs from each Opera browser. It didn't do any of this session business and its very confusing because I can't even seem to find the current session easily, it looks jumbled to me. Neither the top session or bottom is the correct one for example of the actual active session. I regularly shut down and restart my devices but this feature only gave the current active session on each device, not the entire history or sessions, it's annoying and I don't want that, make it stop! hehe.
For me my case usage is pretty simple. I work at my desk, open tabs as I need that I want to watch or read later, and my desktop machine is a HTPC, so its more convenient to then consume that content from there than at my desk sometimes. From the desktop device I just want to peak into the Laptops tabs and select which tabs to open here, it used to work well like this, now its a mess...