[Bug?] Config files not always updating

For the example with ShooterGame: after you set the value to 20.0, and you save DefaultEngine.ini, close it, open ShooterGame in editor (and see no change)… if you then close the editor and open DefaultEngine.ini again, what value is saved in the file? Does it keep your change of 20.0, or does it revert to the original 3.0?