I noticed this funny visual bug about half year ago, where Groupy tabs appear on desktop before window itself (example, when you launch File Explorer with Groupy tabs enabled). It is always like this, no matter what is your settings (shorter animation, "less waiting"). I guess WindowFX will ignore Groupy tabs, so those tabs appear on desktop almost instantly when you launch (example) file explorer and then it will animate "standard window" with selected animation speed.
I was little bit disappointed that Stardock support didn't want to forward this or any feedback to the relevant team, no matter how poor is your English language, so i finally posted this "report" after 3 months here.
Another issue is that why there is no dark fonts on Start10, it is impossible to use (new upcoming) White themes. Do i need to post this as separate issue?!