[Question] Bug or glitch?

[DazTroyer]

Twice now when I've played the buttons take me out of the game like this:-

Tab - brings up some scrolling windows tiles, one being my home screen, one the game (usually blank) and one what ever other app I have open.

E - brings up two "my computer" pages

D - takes me back to my home screen.

Forward back and left work as they should and I can get back into the game. However I have to restart my pc to fix it.

Any ideas or is this a known glitch?