P3D v4 Immense lag & stutters when P3D v4 window in focus

[dalle182 0]

Guys I have the weirdest problem... Please help, ChasePlane and my P3D v4 has become unusable!

Every time the sim window is in focus (being it full screen of not), ChasePlane lags like crazy: I press the "next view" key and it changes views VERY slowly only after 1 or 2 seconds for example. It lags so much that I can't even pan around with the mouse, no reaction. I have this problem with every ChasePlane action: panning with the mouse, panning with the joystick, changing views with the keyboard shortcuts, panning around with Track IR... basically, everything. What I don't understand is that once I switch focus to ChasePlane window using WIN+TAB for example, the views change smoothly, Track IR works seamlessly, etc. 

I already tried to turn on/off experimental versions, advanced features, disable control input system, (clean) uninstall/reinstall ChasePlane, delete cameras.cfg, turn up/down sim settings (it's not at all related to sim's FPS), run the sim full screen or windowed mode... Nothing has helped so far. Everything was working great a few days ago and I can't figure out when and where the problem originated.

Any help greatly appreciated! 

[Keven Menard 658]

Disable Game Mode

[dalle182 0]

Thank you problem solved! So it was maybe some windows updates that messed the whole thing up...