Many games refuse to go Fullscreen mode -- no idea why.
I thought it was a localized Battlefield 1 problem, but then I tried Overwatch and I get the same experience. If a game launches in fullscreen mode it willl minimize to the tray. Clicking it will maximize it for a second then it will minimize again.
I can play these games in Borderless Windowed no problem. But not full screen. I tried wiping my graphics drivers, I tried playing just through the HDMI on my motherboard, but I get the same result, so I am assuming its something Windows related. Just not sure what.