Hello,
Sorry to hear you are having issues. I checked your issue on my system. But, I can not reproduce your issue. This is what I saw on my system, with always combine turn on and open two vivaldi windows. This is what you expected it to work, yes?
So this don't happen or never happen in your desktop system. First, try this, uninstall Start11v2. Reboot immediately, after uninstall finished. Re-download Start11 v2.11. Install it, reboot immediately again after installation finished. Retest it and report back.
Thanks
Basj,
Stardock Community Assistant.