can`t move windows from one Monitor to an other


I have 3 monitors 2x27" HD and once 29" in 21: 9 format (2560:1080). Arranged like a triangle.
The two 27" below, the larger one above it, my main monitor is down to the left.
Unfortunately, Cubase does not notice my layout of the windows.
Not bad, I help myself with the window manager displayfusion (since Cubas5 I have).
Unfortunately, it is not possible without crash to move the editor window from one screen to the other.
It takes about 5 seconds then Cubase disappears.
Does anyone have similar experiences or can help me?
A crah dump I can`t hang on because it is to large (about 52 MB)…?
Maybe I can send it…

Thank you very much!!!