I honestly have no idea what's going on. I'm using the standard window_set_fullscreen(), and I didn't use to have any issues. Recently however, when I'm changing from fullscreen to windowed mode, the screen stretches, it acts like it's broken for a second, then it goes back to windowed mode. Although it isn't a game-breaking glitch, it does look very unsightly. The first picture is just normal fullscreen, the second is in between fullscreen and windowed mode.
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