Ight so I just started having this issue about a week or two ago, and i'll try to explain it through pictures as best I can.
So lets say I have minecraft open on one side of my screen, and im browsing the forums/watching a video on the other.

But then when I go back to play Minecraft, this stuff happens:

It minimizes my screen all weird. At first this didnt bother me, but now, since im doing several things at once, its becoming quite obnoxious. Please tell me there is some way to fix it from happening.