What I was trying to do
Tweak settings after starting the game for the first time.
The game shrunk into a roughly quarter-sized window, even though full screen was on.
What I expected to happen
The resized window should have been full screen.
My native screen resolution is 2560x1440, I was changing it to 1920x1080 because the text was too small on my laptop (even with DPI aware on).