MP wonderful. White lines loading mission

Hi.

What a great program MP is, plenty of nice features for its everyday use. My deepest recognition to Michael.

When loading a mission I see horizontal and vertical white lines:

Since I want a screen capture of that, I use arrows keystrokes to get this:

and then do the capture. After 100 or 150 keystrokes the white lines disappear (I always succeed in this).

I use a 1920x1080 monitor. Can this be solved?