I was able to reproduce that bug with Totem, VLC and Chrome. I didn't test other programs.
The key to reproduce is the "Always on Top" setting. You have to right click the window decoration and check that setting and then just go to fullscreen and lock the screen. You will see the video or webpage and other things in a bleed through mode and no elements of the lock screen.
Typing the password unlocks screen.
I don't confirm the problem occuring when the screen locks automatically after timeout. I couldn't reproduce that part of Bug Description.
I was able to reproduce that bug with Totem, VLC and Chrome. I didn't test other programs.
The key to reproduce is the "Always on Top" setting. You have to right click the window decoration and check that setting and then just go to fullscreen and lock the screen. You will see the video or webpage and other things in a bleed through mode and no elements of the lock screen.
Typing the password unlocks screen.
I don't confirm the problem occuring when the screen locks automatically after timeout. I couldn't reproduce that part of Bug Description.