Hello,
Sorry to hear you are having issues. What you can do manually group two application. Than choose the groupy tab that don't have groupy tab when open alone. Click 3 dot menu. Select/Tick "Always show tabs for this type of window". From this moment on. Groupy should appear every time that application. As long as that application work with Groupy.
Thanks
Basj,
Stardock Community Assistant.