Hello,
Sorry to hear you are having issues. I tested and I see the issue. Not sure if its Groupy issue. My guess is that is how Alt-Tab Terminator work, it can not read the Groupy grouped Windows as separate Windows, not like default Windows Alt-tab would show the Groupy Group separately . However to be sure, I have forward your problem/question to Stardock Support Team for their assistance. Please keep an eye on this thread for any updates. We appreciate your feedback and patience.
Thank you.
Basj,
Stardock Community Assistant.