NOTES field opens not on place but on primary screen.

when I like to type somethingn in the NOTES field, it opens on the primary screen even if my project is on another. See Screenshot: the red line markes the boarder from 2 screens (of my 5-screen configuration). The upper screen is my primary windows screen.
I clicked in the notes filed below and it opens up on top.
C8_Notes-field.jpg

I noticed it on the opening options dialogue of the transport window as well.
My transport section is on lower screen but the menu opens on the top screen when clicking record options.

I am not shure if this is an AMD CATALYST issue or a bug in Cubase. Anyway it just appeared in Cubase 8