3D editor works, blueprints and such does not

A very unusual glitch or bug that’s making the editor run real slow to the point where I’m waiting 5 minutes for each action I’m doing. The 3D editor where you’re seeing the game world and editing each geometry of the level works fine! I’m using two monitors so I can learn how use this program without sharing 2 monitors in one window. The thing is it never happened when I started using two monitors and I believe version 4.12.5 has to do something about this.

When I enter to play the game my controls were off and actually was in the middle of building them.