Single screen, always after gaming the transparency is gone.
I dont know how produce such video, using nvidia drivers i can record ingame, this will not make the issue visible.
I will create screenshots...
before gaming:

after gaming, dx12 (darktide) or zombie army 4 (vulkan)

After the game close it may flicker, 2-3 seconds later it is intranspartent.
I need to go to the start11 app and move the transparence slider and then it become transparent again