ALT+TAB destroys full-screen focus

anzacnw

I play using full-screen mode (1920x1080 while desktop resolution is 2560x1440) and when I switched to another window with ALT+TAB and then back I didn't encounter any problems until latest patch on Tuesday. Now, when I switch to another application/window and then back to the game, the mouse doesn't work properly anymore, it seems to be stuck in another, wrong resolution. Also most of the visual effects are broken as if a software renderer is used. Switching to a windowed mode and then back to full-screen fixes this problem, but that can't really be the solution.