[GAMEPLAY] Alt-Tab Bug (Full Screen)

It's not really a game changer but it makes it hard to use peripheral vision to check my health. As usual when I forget to turn my music back on I Alt-Tab out of loading screen to turn it on. However it just so happened when the game loaded it flickered from game to desktop a couple of times when I tried to Alt-Tab/Clicking task bar back into the game. My health bar was completely black, the indicator that showed the amount of health was a barely visible bar. Also when tabbing for score and timers there was no border around the information on the UI, just floating mass of info. Hope this helps.

Edit: This has happened a numeral of times however I don't remember exactly which games.