Alt-Tabbing makes the game enter borderless window. How to fix?

I set my game to run at 1920x1080 full-screen but whenever I alt-tab the game switches to borderless window. I prefer the performance of true full-screen. Is there a solution to this problem?

Yeah, when you Alt-Tab back use Alt-Enter to go back to fullscreen.

I am aware of that. I posted this in search of a longer lasting solution. I alt-tab a lot. The gamma bug doesn’t help either.