This is a recent-ish issue and I haven't been able to nail down what's causing it or how to prevent it really (beyond not alt-tabbing, but that's too much of a convenience).

Whenever I play a full screen game (I make use of borderless windows whenever possible), tabbing out results in the display contrast getting a lot sharper for lack of a better word. Website with a blue hue in the background will now look almost completely black. Launching other games makes them nearly unplayable since all the colours are so sharp. The only way to go around this is to restart the PC but it's frustrating when this can happen multiple times in a day.

Is anyone familiar with this issue and maybe how to prevent it? I've considered that using flux might be adding to the issue but I've been using it for years now and this has only become a problem very recently.