The transparency effect should exist when touch keyboard is docked to the bottom of the screen

right now the transparency effect only exists when the touch keyboard is moveable and not docked. the effect is beautiful and also gives us an idea of what's behind the screen, I need the transparency effect even when the touch keyboard is docked.

Windows 10 insider build 21277

please upvote the feedback on feedback hub: https://aka.ms/AAamt8w