I do not think that this is to do with the game itself, but my computer. Or Monitor. I have a 1080P Monitor, and sometimes, when I tab out, and tab back in, my screen goes black. Same happens when i minimize (alt + enter). Basicly, in the end, when tabbing out/in and changing client size, it results in black screen. My only option is to either force a restart of my computer, or CTRL ALT DEL and sign out of my computer. Also, there is also another issue. Sometimes, when tabbing in and out, it says something like NOT RIGHT SIZE (Not actual words but i forgot). If there is any solution, please help. Also, my files get moved into top left corner. Probably the size of minimized maplestory client.