MapleStory changes screen resolution when plugging my laptop in to charge.

Whenever I have MapleStory on and I plug in my laptop to charge, my laptop screen would black out for a second and then come back to normal but with a different screen resolution. It changes from 1600x900 to 800x600. This only happens when I'm in-game; it doesn't happen when I'm alt-tabbed. Maple itself doesn't look any different, but when I alt-tab, everything is far larger than it would be at normal screen resolution. It's not a big deal or anything, it's just annoying how I have to change the screen resolution back everytime this happens. If anyone knows how to keep this from happening, please help! Thanks.

P.S: This also happens when I unplug the charger from my laptop while I'm on Maple.